diff --git a/lib/src/blame.dart b/lib/src/blame.dart
index fddf426..3354218 100644
--- a/lib/src/blame.dart
+++ b/lib/src/blame.dart
@@ -83,7 +83,7 @@ class Blame with IterableMixin<BlameHunk> {
   ///
   /// Throws [RangeError] if index out of range.
   BlameHunk operator [](int index) {
-    return BlameHunk(
+    return BlameHunk._(
       bindings.getHunkByIndex(
         blamePointer: _blamePointer,
         index: index,
@@ -96,7 +96,7 @@ class Blame with IterableMixin<BlameHunk> {
   ///
   /// Throws [RangeError] if [lineNumber] is out of range.
   BlameHunk forLine(int lineNumber) {
-    return BlameHunk(
+    return BlameHunk._(
       bindings.getHunkByLine(
         blamePointer: _blamePointer,
         lineNumber: lineNumber,
@@ -123,7 +123,7 @@ final _finalizer = Finalizer<Pointer<git_blame>>(
 class BlameHunk {
   /// Initializes a new instance of the [BlameHunk] class from
   /// provided pointer to blame hunk object in memory.
-  const BlameHunk(this._blameHunkPointer);
+  const BlameHunk._(this._blameHunkPointer);
 
   /// Pointer to memory address for allocated blame hunk object.
   final Pointer<git_blame_hunk> _blameHunkPointer;
@@ -203,7 +203,7 @@ class _BlameIterator implements Iterator<BlameHunk> {
     if (index == count) {
       return false;
     } else {
-      currentHunk = BlameHunk(
+      currentHunk = BlameHunk._(
         bindings.getHunkByIndex(
           blamePointer: _blamePointer,
           index: index,
diff --git a/lib/src/diff.dart b/lib/src/diff.dart
index bc02316..4af064b 100644
--- a/lib/src/diff.dart
+++ b/lib/src/diff.dart
@@ -498,10 +498,10 @@ class DiffDelta {
   int get numberOfFiles => _diffDeltaPointer.ref.nfiles;
 
   /// Represents the "from" side of the diff.
-  DiffFile get oldFile => DiffFile(_diffDeltaPointer.ref.old_file);
+  DiffFile get oldFile => DiffFile._(_diffDeltaPointer.ref.old_file);
 
   /// Represents the "to" side of the diff.
-  DiffFile get newFile => DiffFile(_diffDeltaPointer.ref.new_file);
+  DiffFile get newFile => DiffFile._(_diffDeltaPointer.ref.new_file);
 
   @override
   String toString() {
@@ -518,7 +518,7 @@ class DiffDelta {
 class DiffFile {
   /// Initializes a new instance of [DiffFile] class from provided diff file
   /// object.
-  const DiffFile(this._diffFile);
+  const DiffFile._(this._diffFile);
 
   final git_diff_file _diffFile;
 
diff --git a/lib/src/odb.dart b/lib/src/odb.dart
index a141e23..111bb58 100644
--- a/lib/src/odb.dart
+++ b/lib/src/odb.dart
@@ -60,7 +60,7 @@ class Odb {
   ///
   /// Throws a [LibGit2Error] if error occured.
   OdbObject read(Oid oid) {
-    return OdbObject(
+    return OdbObject._(
       bindings.read(
         odbPointer: _odbPointer,
         oidPointer: oid.pointer,
@@ -108,7 +108,7 @@ final _finalizer = Finalizer<Pointer<git_odb>>(
 class OdbObject {
   /// Initializes a new instance of the [OdbObject] class from
   /// provided pointer to odbObject object in memory.
-  OdbObject(this._odbObjectPointer) {
+  OdbObject._(this._odbObjectPointer) {
     _objectfinalizer.attach(this, _odbObjectPointer, detach: this);
   }
 
diff --git a/lib/src/patch.dart b/lib/src/patch.dart
index 7eb6e7a..5c28622 100644
--- a/lib/src/patch.dart
+++ b/lib/src/patch.dart
@@ -154,7 +154,7 @@ class Patch {
   PatchStats get stats {
     final result = bindings.lineStats(_patchPointer);
 
-    return PatchStats(
+    return PatchStats._(
       context: result['context']!,
       insertions: result['insertions']!,
       deletions: result['deletions']!,
@@ -266,7 +266,7 @@ final _finalizer = Finalizer<Pointer<git_patch>>(
 
 /// Line counts of each type in a patch.
 class PatchStats {
-  const PatchStats({
+  const PatchStats._({
     required this.context,
     required this.insertions,
     required this.deletions,
diff --git a/lib/src/rebase.dart b/lib/src/rebase.dart
index d917849..93650c4 100644
--- a/lib/src/rebase.dart
+++ b/lib/src/rebase.dart
@@ -55,7 +55,7 @@ class Rebase {
         rebase: _rebasePointer,
         index: i,
       );
-      result.add(RebaseOperation(operation));
+      result.add(RebaseOperation._(operation));
     }
 
     return result;
@@ -99,7 +99,7 @@ class Rebase {
   ///
   /// Throws a [LibGit2Error] if error occured.
   RebaseOperation next() {
-    return RebaseOperation(bindings.next(_rebasePointer));
+    return RebaseOperation._(bindings.next(_rebasePointer));
   }
 
   /// Commits the current patch. You must have resolved any conflicts that were
@@ -151,7 +151,7 @@ final _finalizer = Finalizer<Pointer<git_rebase>>(
 class RebaseOperation {
   /// Initializes a new instance of the [RebaseOperation] class from
   /// provided pointer to rebase operation object in memory.
-  const RebaseOperation(this._rebaseOperationPointer);
+  const RebaseOperation._(this._rebaseOperationPointer);
 
   /// Pointer to memory address for allocated rebase operation object.
   final Pointer<git_rebase_operation> _rebaseOperationPointer;
diff --git a/lib/src/reflog.dart b/lib/src/reflog.dart
index d58dfbd..69a0561 100644
--- a/lib/src/reflog.dart
+++ b/lib/src/reflog.dart
@@ -46,7 +46,7 @@ class RefLog with IterableMixin<RefLogEntry> {
   /// Requesting the reflog entry with an index of 0 will return the most
   /// recently created entry.
   RefLogEntry operator [](int index) {
-    return RefLogEntry(
+    return RefLogEntry._(
       bindings.getByIndex(
         reflogPointer: _reflogPointer,
         index: index,
@@ -106,7 +106,7 @@ final _finalizer = Finalizer<Pointer<git_reflog>>(
 class RefLogEntry {
   /// Initializes a new instance of [RefLogEntry] class from provided
   /// pointer to RefLogEntry object in memory.
-  const RefLogEntry(this._entryPointer);
+  const RefLogEntry._(this._entryPointer);
 
   /// Pointer to memory address for allocated reflog entry object.
   final Pointer<git_reflog_entry> _entryPointer;
@@ -149,7 +149,7 @@ class _RefLogIterator implements Iterator<RefLogEntry> {
     if (_index == _count) {
       return false;
     } else {
-      _currentEntry = RefLogEntry(
+      _currentEntry = RefLogEntry._(
         bindings.getByIndex(
           reflogPointer: _reflogPointer,
           index: _index,
diff --git a/lib/src/revparse.dart b/lib/src/revparse.dart
index 713840f..5df8a63 100644
--- a/lib/src/revparse.dart
+++ b/lib/src/revparse.dart
@@ -75,7 +75,7 @@ class RevParse {
   ///
   /// Throws a [LibGit2Error] if error occured.
   static RevSpec range({required Repository repo, required String spec}) {
-    return RevSpec(
+    return RevSpec._(
       bindings.revParse(
         repoPointer: repo.pointer,
         spec: spec,
@@ -92,7 +92,7 @@ class RevParse {
 class RevSpec {
   /// Initializes a new instance of [RevSpec] class from provided
   /// pointer to revspec object in memory.
-  const RevSpec(this._revSpecPointer);
+  const RevSpec._(this._revSpecPointer);
 
   /// Pointer to memory address for allocated revspec object.
   final Pointer<git_revspec> _revSpecPointer;