diff --git a/pkgs/development/libraries/ada/gnatcoll/bindings.nix b/pkgs/development/libraries/ada/gnatcoll/bindings.nix
index fb2a744be7fb..9d22551b32a9 100644
--- a/pkgs/development/libraries/ada/gnatcoll/bindings.nix
+++ b/pkgs/development/libraries/ada/gnatcoll/bindings.nix
@@ -33,19 +33,15 @@ in
 
 stdenv.mkDerivation rec {
   pname = "gnatcoll-${component}";
-  version = "22.0.0";
+  version = "23.0.0";
 
   src = fetchFromGitHub {
     owner = "AdaCore";
     repo = "gnatcoll-bindings";
     rev = "v${version}";
-    sha256 = "0wbwnd6jccwfd4jdxbnzhc0jhm8ad4phz6y9b1gk8adykkk6jcz4";
+    sha256 = "1jnnfsvll4jh6ip0fww4mh2cm61h7dzpxz3zaa2psrc1w54x34nn";
   };
 
-  patches = [
-    ./omp-setup-text-mode.patch
-  ];
-
   nativeBuildInputs = [
     gprbuild
     gnat
diff --git a/pkgs/development/libraries/ada/gnatcoll/omp-setup-text-mode.patch b/pkgs/development/libraries/ada/gnatcoll/omp-setup-text-mode.patch
deleted file mode 100644
index 07953809bb20..000000000000
--- a/pkgs/development/libraries/ada/gnatcoll/omp-setup-text-mode.patch
+++ /dev/null
@@ -1,23 +0,0 @@
-commit 37c815ee660d1bf37256638d23b0346ad7cc19e7
-Author: sternenseemann <0rpkxez4ksa01gb3typccl0i@systemli.org>
-Date:   Wed Jul 21 00:18:30 2021 +0200
-
-    omp/setup.py: open version_information in text mode
-    
-    Otherwise saving the config in setup_support.py will fail as a bytes
-    object is not encodeable as JSON. Luckily, version_information is text
-    anyways.
-
-diff --git a/omp/setup.py b/omp/setup.py
-index 942ab1f5..5281398e 100755
---- a/omp/setup.py
-+++ b/omp/setup.py
-@@ -25,7 +25,7 @@ class GNATCollOMP(SetupApp):
- 
-         # Set library version
-         with open(os.path.join(config.source_dir, '..',
--                               'version_information'), 'rb') as fd:
-+                               'version_information'), 'r') as fd:
-             version = fd.read().strip()
-         config.set_data('GNATCOLL_VERSION', version, sub='gprbuild')
-