diff --git a/src/TensorFlowNET.Core/Eager/SafeContextHandle.cs b/src/TensorFlowNET.Core/Eager/SafeContextHandle.cs
index 9fa8db79..de5cd2f1 100644
--- a/src/TensorFlowNET.Core/Eager/SafeContextHandle.cs
+++ b/src/TensorFlowNET.Core/Eager/SafeContextHandle.cs
@@ -21,7 +21,7 @@ namespace Tensorflow.Eager
 {
     public sealed class SafeContextHandle : SafeTensorflowHandle
     {
-        public SafeContextHandle()
+        private SafeContextHandle()
         {
         }
 
diff --git a/src/TensorFlowNET.Core/Eager/SafeContextOptionsHandle.cs b/src/TensorFlowNET.Core/Eager/SafeContextOptionsHandle.cs
index aac6ff00..6a6d1d76 100644
--- a/src/TensorFlowNET.Core/Eager/SafeContextOptionsHandle.cs
+++ b/src/TensorFlowNET.Core/Eager/SafeContextOptionsHandle.cs
@@ -21,7 +21,7 @@ namespace Tensorflow.Eager
 {
     public sealed class SafeContextOptionsHandle : SafeTensorflowHandle
     {
-        public SafeContextOptionsHandle()
+        private SafeContextOptionsHandle()
         {
         }
 
diff --git a/src/TensorFlowNET.Core/Graphs/SafeImportGraphDefOptionsHandle.cs b/src/TensorFlowNET.Core/Graphs/SafeImportGraphDefOptionsHandle.cs
index c1aac9d1..9fc62f1d 100644
--- a/src/TensorFlowNET.Core/Graphs/SafeImportGraphDefOptionsHandle.cs
+++ b/src/TensorFlowNET.Core/Graphs/SafeImportGraphDefOptionsHandle.cs
@@ -21,7 +21,7 @@ namespace Tensorflow
 {
     public sealed class SafeImportGraphDefOptionsHandle : SafeTensorflowHandle
     {
-        public SafeImportGraphDefOptionsHandle()
+        private SafeImportGraphDefOptionsHandle()
         {
         }
 
diff --git a/src/TensorFlowNET.Core/Sessions/SafeSessionOptionsHandle.cs b/src/TensorFlowNET.Core/Sessions/SafeSessionOptionsHandle.cs
index 95109cce..00f2e35b 100644
--- a/src/TensorFlowNET.Core/Sessions/SafeSessionOptionsHandle.cs
+++ b/src/TensorFlowNET.Core/Sessions/SafeSessionOptionsHandle.cs
@@ -21,7 +21,7 @@ namespace Tensorflow
 {
     public sealed class SafeSessionOptionsHandle : SafeTensorflowHandle
     {
-        public SafeSessionOptionsHandle()
+        private SafeSessionOptionsHandle()
         {
         }
 
diff --git a/src/TensorFlowNET.Core/Status/SafeStatusHandle.cs b/src/TensorFlowNET.Core/Status/SafeStatusHandle.cs
index 81fcd4fb..d20a9d57 100644
--- a/src/TensorFlowNET.Core/Status/SafeStatusHandle.cs
+++ b/src/TensorFlowNET.Core/Status/SafeStatusHandle.cs
@@ -21,7 +21,7 @@ namespace Tensorflow
 {
     public sealed class SafeStatusHandle : SafeTensorflowHandle
     {
-        public SafeStatusHandle()
+        private SafeStatusHandle()
         {
         }