diff --git a/ObjectiveGit/Categories/NSData+Git.m b/ObjectiveGit/Categories/NSData+Git.m
index 9d02e6ed..42d31f21 100644
--- a/ObjectiveGit/Categories/NSData+Git.m
+++ b/ObjectiveGit/Categories/NSData+Git.m
@@ -35,18 +35,14 @@ + (instancetype)git_dataWithBuffer:(git_buf *)buffer {
 
 	if (buffer->size == 0) return [self data];
 
-	// Ensure that the buffer is actually allocated dynamically, not pointing to
-	// some data which may disappear.
-	if (git_buf_grow(buffer, 0) != GIT_OK) return nil;
-	
 	NSData *data = [self dataWithBytesNoCopy:buffer->ptr length:buffer->size freeWhenDone:YES];
-	*buffer = (git_buf)GIT_BUF_INIT_CONST(0, NULL);
+	*buffer = (git_buf)GIT_BUF_INIT;
 
 	return data;
 }
 
 - (git_buf)git_buf {
-	return (git_buf)GIT_BUF_INIT_CONST((void *)self.bytes, self.length);
+	return (git_buf){ (char *)self.bytes, 0, self.length };
 }
 
 - (BOOL)git_containsNUL {
diff --git a/ObjectiveGit/GTBlob.m b/ObjectiveGit/GTBlob.m
index c4988109..0bffe622 100644
--- a/ObjectiveGit/GTBlob.m
+++ b/ObjectiveGit/GTBlob.m
@@ -36,7 +36,6 @@
 
 #import "git2/blob.h"
 #import "git2/errors.h"
-#import "git2/deprecated.h"
 
 @implementation GTBlob
 
@@ -85,7 +84,7 @@ - (instancetype)initWithData:(NSData *)data inRepository:(GTRepository *)reposit
 	NSParameterAssert(repository != nil);
 
 	git_oid oid;
-	int gitError = git_blob_create_frombuffer(&oid, repository.git_repository, [data bytes], data.length);
+	int gitError = git_blob_create_from_buffer(&oid, repository.git_repository, [data bytes], data.length);
 	if(gitError < GIT_OK) {
 		if(error != NULL) {
 			*error = [NSError git_errorFor:gitError description:@"Failed to create blob from NSData"];
@@ -101,7 +100,7 @@ - (instancetype)initWithFile:(NSURL *)file inRepository:(GTRepository *)reposito
 	NSParameterAssert(repository != nil);
 
 	git_oid oid;
-	int gitError = git_blob_create_fromdisk(&oid, repository.git_repository, [[file path] fileSystemRepresentation]);
+	int gitError = git_blob_create_from_disk(&oid, repository.git_repository, [[file path] fileSystemRepresentation]);
 	if(gitError < GIT_OK) {
 		if(error != NULL) {
 			*error = [NSError git_errorFor:gitError description:@"Failed to create blob from NSURL"];
@@ -137,8 +136,9 @@ - (NSData *)data {
 - (NSData *)applyFiltersForPath:(NSString *)path error:(NSError **)error {
 	NSCParameterAssert(path != nil);
 
-	git_buf buffer = GIT_BUF_INIT_CONST(0, NULL);
-	int gitError = git_blob_filtered_content(&buffer, self.git_blob, path.UTF8String, 1);
+	git_buf buffer = GIT_BUF_INIT;
+	git_blob_filter_options opts = GIT_BLOB_FILTER_OPTIONS_INIT;
+	int gitError = git_blob_filter(&buffer, self.git_blob, path.UTF8String, &opts);
 	if (gitError != GIT_OK) {
 		if (error != NULL) *error = [NSError git_errorFor:gitError description:@"Failed to apply filters for path %@ to blob", path];
 		return nil;
diff --git a/ObjectiveGit/GTBranch.m b/ObjectiveGit/GTBranch.m
index 9cbbf7c3..c362218f 100644
--- a/ObjectiveGit/GTBranch.m
+++ b/ObjectiveGit/GTBranch.m
@@ -37,7 +37,7 @@
 #import "git2/branch.h"
 #import "git2/errors.h"
 #import "git2/graph.h"
-#import "git2/deprecated.h"
+#import "git2/buffer.h"
 
 @implementation GTBranch
 
@@ -116,7 +116,7 @@ - (GTOID *)OID {
 }
 
 - (NSString *)remoteName {
-	git_buf remote_name = GIT_BUF_INIT_CONST(0, NULL);
+	git_buf remote_name = GIT_BUF_INIT;
 	int gitError = git_branch_remote_name(&remote_name, self.repository.git_repository, self.reference.name.UTF8String);
 	if (gitError != GIT_OK) return nil;
 
diff --git a/ObjectiveGit/GTConfiguration.m b/ObjectiveGit/GTConfiguration.m
index 6c1e41e3..586a3220 100644
--- a/ObjectiveGit/GTConfiguration.m
+++ b/ObjectiveGit/GTConfiguration.m
@@ -17,7 +17,7 @@
 #import "git2/config.h"
 #import "git2/errors.h"
 #import "git2/buffer.h"
-#import "git2/deprecated.h"
+#import "git2/strarray.h"
 
 @interface GTConfiguration ()
 @property (nonatomic, readonly, assign) git_config *git_config;
@@ -144,7 +144,7 @@ - (NSArray *)remotes {
 		}
 	}
 
-	git_strarray_free(&names);
+	git_strarray_dispose(&names);
 
 	return remotes;
 }
diff --git a/ObjectiveGit/GTCredential.m b/ObjectiveGit/GTCredential.m
index 0aad1f76..d996f17b 100644
--- a/ObjectiveGit/GTCredential.m
+++ b/ObjectiveGit/GTCredential.m
@@ -11,7 +11,6 @@
 #import "NSError+Git.h"
 
 #import "git2/errors.h"
-#import "git2/deprecated.h"
 #import "git2/sys/errors.h"
 
 typedef GTCredential *(^GTCredentialProviderBlock)(GTCredentialType allowedTypes, NSString *URL, NSString *userName);
@@ -41,14 +40,14 @@ - (GTCredential *)credentialForType:(GTCredentialType)type URL:(NSString *)URL u
 @end
 
 @interface GTCredential ()
-@property (nonatomic, assign, readonly) git_cred *git_cred;
+@property (nonatomic, assign, readonly) git_credential *git_cred;
 @end
 
 @implementation GTCredential
 
 + (instancetype)credentialWithUserName:(NSString *)userName password:(NSString *)password error:(NSError **)error {
-	git_cred *cred;
-	int gitError = git_cred_userpass_plaintext_new(&cred, userName.UTF8String, password.UTF8String);
+	git_credential *cred;
+	int gitError = git_credential_userpass_plaintext_new(&cred, userName.UTF8String, password.UTF8String);
 	if (gitError != GIT_OK) {
 		if (error) *error = [NSError git_errorFor:gitError description:@"Failed to create credentials object" failureReason:@"There was an error creating a credential object for username %@.", userName];
 		return nil;
@@ -63,8 +62,8 @@ + (instancetype)credentialWithUserName:(NSString *)userName publicKeyURL:(NSURL
 	NSString *privateKeyPath = privateKeyURL.filePathURL.path;
 	NSAssert(privateKeyPath != nil, @"Invalid file URL passed: %@", privateKeyURL);
 
-	git_cred *cred;
-	int gitError = git_cred_ssh_key_new(&cred, userName.UTF8String, publicKeyPath.fileSystemRepresentation, privateKeyPath.fileSystemRepresentation, passphrase.UTF8String);
+	git_credential *cred;
+	int gitError = git_credential_ssh_key_new(&cred, userName.UTF8String, publicKeyPath.fileSystemRepresentation, privateKeyPath.fileSystemRepresentation, passphrase.UTF8String);
 	if (gitError != GIT_OK) {
 		if (error) *error = [NSError git_errorFor:gitError description:@"Failed to create credentials object" failureReason:@"There was an error creating a credential object for username %@ with the provided public/private key pair.\nPublic key: %@\nPrivate key: %@", userName, publicKeyURL, privateKeyURL];
 		return nil;
@@ -76,8 +75,8 @@ + (instancetype)credentialWithUserName:(NSString *)userName publicKeyURL:(NSURL
 + (instancetype)credentialWithUserName:(NSString *)userName publicKeyString:(NSString *)publicKeyString privateKeyString:(NSString *)privateKeyString passphrase:(NSString *)passphrase error:(NSError **)error {
 	NSParameterAssert(privateKeyString != nil);
 	
-	git_cred *cred;
-	int gitError = git_cred_ssh_key_memory_new(&cred, userName.UTF8String, publicKeyString.UTF8String, privateKeyString.UTF8String, passphrase.UTF8String);
+	git_credential *cred;
+	int gitError = git_credential_ssh_key_memory_new(&cred, userName.UTF8String, publicKeyString.UTF8String, privateKeyString.UTF8String, passphrase.UTF8String);
 	if (gitError != GIT_OK) {
 		if (error) *error = [NSError git_errorFor:gitError description:@"Failed to create credentials object" failureReason:@"There was an error creating a credential object for username %@ with the provided public/private key pair.\nPublic key: %@", userName, publicKeyString];
 		return nil;
@@ -86,7 +85,7 @@ + (instancetype)credentialWithUserName:(NSString *)userName publicKeyString:(NSS
 	return [[self alloc] initWithGitCred:cred];
 }
 
-- (instancetype)initWithGitCred:(git_cred *)cred {
+- (instancetype)initWithGitCred:(git_credential *)cred {
 	NSParameterAssert(cred != nil);
 	self = [self init];
 
@@ -99,8 +98,8 @@ - (instancetype)initWithGitCred:(git_cred *)cred {
 
 @end
 
-int GTCredentialAcquireCallback(git_cred **git_cred, const char *url, const char *username_from_url, unsigned int allowed_types, void *payload) {
-	NSCParameterAssert(git_cred != NULL);
+int GTCredentialAcquireCallback(git_credential **cred, const char *url, const char *username_from_url, unsigned int allowed_types, void *payload) {
+	NSCParameterAssert(cred != NULL);
 	NSCParameterAssert(payload != NULL);
 
 	GTCredentialAcquireCallbackInfo *info = payload;
@@ -114,12 +113,12 @@ int GTCredentialAcquireCallback(git_cred **git_cred, const char *url, const char
 	NSString *URL = (url != NULL ? @(url) : @"");
 	NSString *userName = (username_from_url != NULL ? @(username_from_url) : nil);
 
-	GTCredential *cred = [provider credentialForType:(GTCredentialType)allowed_types URL:URL userName:userName];
-	if (cred == nil) {
+	GTCredential *gtCred = [provider credentialForType:(GTCredentialType)allowed_types URL:URL userName:userName];
+	if (gtCred == nil) {
 		git_error_set_str(GIT_EUSER, "GTCredentialProvider failed to provide credentials.");
 		return GIT_ERROR;
 	}
 
-	*git_cred = cred.git_cred;
+	*cred = gtCred.git_cred;
 	return GIT_OK;
 }
diff --git a/ObjectiveGit/GTDiff.m b/ObjectiveGit/GTDiff.m
index 28c0ca2a..7dbb28ea 100644
--- a/ObjectiveGit/GTDiff.m
+++ b/ObjectiveGit/GTDiff.m
@@ -18,7 +18,7 @@
 #import "EXTScope.h"
 
 #import "git2/errors.h"
-#import "git2/deprecated.h"
+#import "git2/strarray.h"
 
 NSString *const GTDiffOptionsFlagsKey = @"GTDiffOptionsFlagsKey";
 NSString *const GTDiffOptionsContextLinesKey = @"GTDiffOptionsContextLinesKey";
@@ -72,7 +72,7 @@ + (int)handleParsedOptionsDictionary:(NSDictionary *)dictionary usingBlock:(int
 	git_strarray strArray = pathSpec.git_strarray;
 	if (pathSpec != nil) newOptions.pathspec = strArray;
 	@onExit {
-		git_strarray_free((git_strarray *)&strArray);
+		git_strarray_dispose((git_strarray *)&strArray);
 	};
 
 	git_diff_options *optionsPtr = &newOptions;
diff --git a/ObjectiveGit/GTDiffPatch.m b/ObjectiveGit/GTDiffPatch.m
index 1f956440..8020b729 100644
--- a/ObjectiveGit/GTDiffPatch.m
+++ b/ObjectiveGit/GTDiffPatch.m
@@ -9,7 +9,7 @@
 #import "GTDiffPatch.h"
 
 #import "GTDiffHunk.h"
-#import "git2/deprecated.h"
+#import "git2/buffer.h"
 
 @interface GTDiffPatch ()
 
@@ -66,7 +66,7 @@ - (NSUInteger)sizeWithContext:(BOOL)includeContext hunkHeaders:(BOOL)includeHunk
 }
 
 - (NSData *)patchData {
-	git_buf buf = GIT_BUF_INIT_CONST(0, NULL);
+	git_buf buf = GIT_BUF_INIT;
 	git_patch_to_buf(&buf, self.git_patch);
 
 	NSData *buffer = [[NSData alloc] initWithBytes:buf.ptr length:buf.size];
diff --git a/ObjectiveGit/GTFilterList.m b/ObjectiveGit/GTFilterList.m
index f325b75f..d381c805 100644
--- a/ObjectiveGit/GTFilterList.m
+++ b/ObjectiveGit/GTFilterList.m
@@ -14,7 +14,7 @@
 #import "NSError+Git.h"
 
 #import "git2/errors.h"
-#import "git2/deprecated.h"
+#import "git2/buffer.h"
 
 @interface GTFilterList ()
 
@@ -54,9 +54,8 @@ - (void)dealloc {
 - (NSData *)applyToData:(NSData *)inputData error:(NSError **)error {
 	NSParameterAssert(inputData != nil);
 
-	git_buf input = inputData.git_buf;
-	git_buf output = GIT_BUF_INIT_CONST(0, NULL);
-	int gitError = git_filter_list_apply_to_data(&output, self.git_filter_list, &input);
+	git_buf output = GIT_BUF_INIT;
+	int gitError = git_filter_list_apply_to_buffer(&output, self.git_filter_list, inputData.bytes, inputData.length);
 
 	if (gitError != GIT_OK) {
 		if (error != NULL) *error = [NSError git_errorFor:gitError description:@"Failed to apply filter list to data buffer"];
@@ -70,7 +69,7 @@ - (NSData *)applyToPath:(NSString *)relativePath inRepository:(GTRepository *)re
 	NSParameterAssert(relativePath != nil);
 	NSParameterAssert(repository != nil);
 
-	git_buf output = GIT_BUF_INIT_CONST(0, NULL);
+	git_buf output = GIT_BUF_INIT;
 	// fixme: This is a workaround for an issue where `git_filter_list_apply_to_file`
 	// will not resolve relative paths against the worktree. It should be reverted when
 	// libgit2 has been updated to resolve that.
@@ -88,7 +87,7 @@ - (NSData *)applyToPath:(NSString *)relativePath inRepository:(GTRepository *)re
 - (NSData *)applyToBlob:(GTBlob *)blob error:(NSError **)error {
 	NSParameterAssert(blob != nil);
 
-	git_buf output = GIT_BUF_INIT_CONST(0, NULL);
+	git_buf output = GIT_BUF_INIT;
 	int gitError = git_filter_list_apply_to_blob(&output, self.git_filter_list, blob.git_blob);
 
 	if (gitError != GIT_OK) {
diff --git a/ObjectiveGit/GTIndex.m b/ObjectiveGit/GTIndex.m
index e27384e4..651650bc 100644
--- a/ObjectiveGit/GTIndex.m
+++ b/ObjectiveGit/GTIndex.m
@@ -41,7 +41,7 @@
 #import "NSError+Git.h"
 
 #import "git2/errors.h"
-#import "git2/deprecated.h"
+#import "git2/index.h"
 
 // The block synonymous with libgit2's `git_index_matched_path_cb` callback.
 typedef BOOL (^GTIndexPathspecMatchedBlock)(NSString *matchedPathspec, NSString *path, BOOL *stop);
@@ -197,7 +197,7 @@ - (BOOL)addData:(NSData *)data withPath:(NSString *)path error:(NSError **)error
 	entry.path = [path cStringUsingEncoding:NSUTF8StringEncoding];
 	entry.mode = GIT_FILEMODE_BLOB;
 	
-	int status = git_index_add_frombuffer(self.git_index, &entry, [data bytes], [data length]);
+	int status = git_index_add_from_buffer(self.git_index, &entry, [data bytes], [data length]);
 	
 	if (status != GIT_OK) {
 		if (error != NULL) *error = [NSError git_errorFor:status description:@"Failed to add data with name %@ into index.", path];
diff --git a/ObjectiveGit/GTOID.m b/ObjectiveGit/GTOID.m
index d4992658..23412df4 100644
--- a/ObjectiveGit/GTOID.m
+++ b/ObjectiveGit/GTOID.m
@@ -11,7 +11,6 @@
 
 #import "git2/errors.h"
 #import "git2/odb.h"
-#import "git2/deprecated.h"
 
 @interface GTOID () {
 	git_oid _git_oid;
@@ -30,7 +29,7 @@ - (const git_oid *)git_oid {
 - (NSString *)SHA {
 	char *SHA = git_oid_tostr_s(self.git_oid);
 	NSString *str = [[NSString alloc] initWithBytes:SHA
-                                             length:GIT_OID_HEXSZ
+                                             length:GIT_OID_SHA1_HEXSIZE
                                            encoding:NSUTF8StringEncoding];
 	NSAssert(str != nil, @"Failed to create SHA string");
 	return str;
@@ -110,7 +109,7 @@ - (NSString *)description {
 
 - (NSUInteger)hash {
 	// Hash the raw OID.
-	NSData *data = [[NSData alloc] initWithBytesNoCopy:_git_oid.id length:GIT_OID_RAWSZ freeWhenDone:NO];
+	NSData *data = [[NSData alloc] initWithBytesNoCopy:_git_oid.id length:GIT_OID_SHA1_SIZE freeWhenDone:NO];
 	return data.hash;
 }
 
diff --git a/ObjectiveGit/GTReference.m b/ObjectiveGit/GTReference.m
index afc49ab6..570a56a1 100644
--- a/ObjectiveGit/GTReference.m
+++ b/ObjectiveGit/GTReference.m
@@ -35,7 +35,7 @@
 #import "GTRepository+References.h"
 
 #import "git2/errors.h"
-#import "git2/deprecated.h"
+#import "git2/refs.h"
 
 @interface GTReference ()
 @property (nonatomic, readonly, assign) git_reference *git_reference;
@@ -235,7 +235,9 @@ - (GTReflog *)reflog {
 }
 
 + (BOOL)isValidReferenceName:(NSString *)refName {
-	return git_reference_is_valid_name(refName.UTF8String) == 1;
+	int valid = 0;
+	int result = git_reference_name_is_valid(&valid, refName.UTF8String);
+	return (result == 0 && valid == 1);
 }
 
 #pragma mark NSObject
diff --git a/ObjectiveGit/GTRemote.m b/ObjectiveGit/GTRemote.m
index ce7dc153..9b25014d 100644
--- a/ObjectiveGit/GTRemote.m
+++ b/ObjectiveGit/GTRemote.m
@@ -17,7 +17,6 @@
 #import "EXTScope.h"
 
 #import "git2/errors.h"
-#import "git2/deprecated.h"
 
 NSString * const GTRemoteRenameProblematicRefSpecs = @"GTRemoteRenameProblematicRefSpecs";
 
@@ -105,7 +104,9 @@ - (NSString *)description {
 + (BOOL)isValidRemoteName:(NSString *)name {
 	NSParameterAssert(name != nil);
 
-	return (git_remote_is_valid_name(name.UTF8String) == 1 ? YES : NO);
+	int valid = 0;
+	int result = git_remote_name_is_valid(&valid, name.UTF8String);
+	return (result == 0 && valid == 1) ? YES : NO;
 }
 
 #pragma mark Properties
@@ -158,7 +159,7 @@ - (BOOL)rename:(NSString *)name error:(NSError **)error {
 		if (error != NULL) *error = [NSError git_errorFor:gitError description:@"Failed to rename remote" userInfo:userInfo failureReason:@"Couldn't rename remote %@ to %@", self.name, name];
 	}
 
-	git_strarray_free(&problematic_refspecs);
+	git_strarray_dispose(&problematic_refspecs);
 
 	return gitError == GIT_OK;
 }
@@ -169,7 +170,7 @@ - (NSArray *)fetchRefspecs {
 	if (gitError != GIT_OK) return nil;
 
 	@onExit {
-		git_strarray_free(&refspecs);
+		git_strarray_dispose(&refspecs);
 	};
 
 	return [NSArray git_arrayWithStrarray:refspecs];
@@ -182,7 +183,7 @@ - (NSArray *)pushRefspecs {
 	if (gitError != GIT_OK) return nil;
 
 	@onExit {
-		git_strarray_free(&refspecs);
+		git_strarray_dispose(&refspecs);
 	};
 	
 	return [NSArray git_arrayWithStrarray:refspecs];
diff --git a/ObjectiveGit/GTRepository+RemoteOperations.m b/ObjectiveGit/GTRepository+RemoteOperations.m
index 00e4bcfb..5d477472 100644
--- a/ObjectiveGit/GTRepository+RemoteOperations.m
+++ b/ObjectiveGit/GTRepository+RemoteOperations.m
@@ -24,7 +24,6 @@
 #import "git2/remote.h"
 #import "git2/notes.h"
 #import "git2/buffer.h"
-#import "git2/deprecated.h"
 
 NSString *const GTRepositoryRemoteOptionsCredentialProvider = @"GTRepositoryRemoteOptionsCredentialProvider";
 NSString *const GTRepositoryRemoteOptionsFetchPrune = @"GTRepositoryRemoteOptionsFetchPrune";
@@ -98,7 +97,7 @@ - (BOOL)fetchRemote:(GTRemote *)remote withOptions:(NSDictionary *)options error
 	}
 
 	@onExit {
-		git_strarray_free(&refspecs);
+		git_strarray_dispose(&refspecs);
 	};
 
 	NSString *reflog_message = [NSString stringWithFormat:@"fetching remote %@", remote.name];
diff --git a/ObjectiveGit/GTRepository+Status.m b/ObjectiveGit/GTRepository+Status.m
index e662c854..5b0db99e 100644
--- a/ObjectiveGit/GTRepository+Status.m
+++ b/ObjectiveGit/GTRepository+Status.m
@@ -15,7 +15,6 @@
 #import "EXTScope.h"
 
 #import "git2/errors.h"
-#import "git2/deprecated.h"
 
 NSString *const GTRepositoryStatusOptionsShowKey = @"GTRepositoryStatusOptionsShow";
 NSString *const GTRepositoryStatusOptionsFlagsKey = @"GTRepositoryStatusOptionsFlags";
@@ -42,7 +41,7 @@ - (BOOL)enumerateFileStatusWithOptions:(NSDictionary *)options error:(NSError **
 	int err = git_status_list_new(&statusList, self.git_repository, &gitOptions);
 	@onExit {
 		git_status_list_free(statusList);
-		if (gitOptions.pathspec.count > 0) git_strarray_free(&gitOptions.pathspec);
+		if (gitOptions.pathspec.count > 0) git_strarray_dispose(&gitOptions.pathspec);
 	};
 	
 	if (err != GIT_OK) {