diff --git a/CHANGES.md b/CHANGES.md
index 32c2f300..aad36cbb 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,13 @@
+## ctypes 0.10.1
+
+### Bug fixes 
+
+* Always extend integers returned from closures to full word size  
+  (Fixes incorrectly-promoted integers returned from callbacks on ARM and MIPS)  
+  https://github.com/ocamllabs/ocaml-ctypes/pull/456
+
+Thanks to Andreas Hauptmann (@fdopen) for contributions to this release.
+
 ## ctypes 0.10.0
 
 ### Features
diff --git a/META b/META
index 1e4c9c62..6276bab5 100644
--- a/META
+++ b/META
@@ -1,4 +1,4 @@
-version = "0.10.0"
+version = "0.10.1"
 description = "Combinators for binding to C libraries without writing any C."
 requires = "unix bigarray str bytes"
 archive(byte) = "ctypes.cma"
@@ -9,7 +9,7 @@ archive(native, plugin) = "ctypes.cmxs"
 exists_if = "ctypes.cma"
 
 package "top" (
-  version = "0.10.0"
+  version = "0.10.1"
   description = "Toplevel printers for C types"
   requires = "ctypes"
   archive(byte) = "ctypes-top.cma"
@@ -20,7 +20,7 @@ package "top" (
 )
 
 package "stubs" (
-  version = "0.10.0"
+  version = "0.10.1"
   description = "Stub generation from C types"
   requires = "ctypes"
   archive(byte) = "cstubs.cma"
@@ -32,13 +32,13 @@ package "stubs" (
 )
 
 package "foreign" (
- version = "0.10.0"
+ version = "0.10.1"
  description = "Dynamic linking of C functions"
  requires(-mt) = "ctypes.foreign.unthreaded"
  requires(mt) = "ctypes.foreign.threaded"
 
  package "base" (
-  version = "0.10.0"
+  version = "0.10.1"
   description = "Dynamic linking of C functions (base package)"
   requires = "ctypes"
   archive(byte) = "ctypes-foreign-base.cma"
@@ -49,7 +49,7 @@ package "foreign" (
  )
 
  package "threaded" (
-  version = "0.10.0"
+  version = "0.10.1"
   description = "Dynamic linking of C functions (for use in threaded programs)"
   requires = "threads ctypes ctypes.foreign.base"
   archive(byte) = "ctypes-foreign-threaded.cma"
@@ -60,7 +60,7 @@ package "foreign" (
  )
 
  package "unthreaded" (
-  version = "0.10.0"
+  version = "0.10.1"
   description = "Dynamic linking of C functions (for use in unthreaded programs)"
   requires = "ctypes ctypes.foreign.base"
   archive(byte) = "ctypes-foreign-unthreaded.cma"