diff --git a/pkgs/development/python-modules/pycrdt/Cargo.lock b/pkgs/development/python-modules/pycrdt/Cargo.lock
index af359221b346..a71c586dbe55 100644
--- a/pkgs/development/python-modules/pycrdt/Cargo.lock
+++ b/pkgs/development/python-modules/pycrdt/Cargo.lock
@@ -245,7 +245,7 @@ dependencies = [
 
 [[package]]
 name = "pycrdt"
-version = "0.12.11"
+version = "0.12.12"
 dependencies = [
  "pyo3",
  "yrs",
@@ -325,9 +325,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.5.10"
+version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b8c0c260b63a8219631167be35e6a988e9554dbd323f8bd08439c8ed1302bd1"
+checksum = "d2f103c6d277498fbceb16e84d317e2a400f160f46904d5f5410848c829511a3"
 dependencies = [
  "bitflags",
 ]
@@ -387,9 +387,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.14.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fcf8323ef1faaee30a44a340193b1ac6814fd9b7b4e88e9d4519a3e4abe1cfd"
+checksum = "8917285742e9f3e1683f0a9c4e6b57960b7314d0b08d30d1ecd426713ee2eee9"
 
 [[package]]
 name = "syn"
diff --git a/pkgs/development/python-modules/pycrdt/default.nix b/pkgs/development/python-modules/pycrdt/default.nix
index 40694329fec5..bd3bc1cd4a97 100644
--- a/pkgs/development/python-modules/pycrdt/default.nix
+++ b/pkgs/development/python-modules/pycrdt/default.nix
@@ -19,14 +19,14 @@
 
 buildPythonPackage rec {
   pname = "pycrdt";
-  version = "0.12.11";
+  version = "0.12.12";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "jupyter-server";
     repo = "pycrdt";
     tag = version;
-    hash = "sha256-qeDhNr7ZQ0Sxmulye1u5Y2ETdAKYbmYWY0udUaAclpQ=";
+    hash = "sha256-qRr6L27X0g0mvxPECijunpxJilse9fzdKAQZOM0MoDQ=";
   };
 
   postPatch = ''