diff --git a/pkgs/by-name/li/libdeltachat/package.nix b/pkgs/by-name/li/libdeltachat/package.nix
index d6f0ed78c13d..18bc3af5a086 100644
--- a/pkgs/by-name/li/libdeltachat/package.nix
+++ b/pkgs/by-name/li/libdeltachat/package.nix
@@ -20,13 +20,13 @@
 
 stdenv.mkDerivation rec {
   pname = "libdeltachat";
-  version = "1.150.0";
+  version = "1.151.1";
 
   src = fetchFromGitHub {
     owner = "deltachat";
     repo = "deltachat-core-rust";
     rev = "v${version}";
-    hash = "sha256-lVMXW2fnpoa/iiypLhHl7WXLqouHfrRapEbXL37X7B8=";
+    hash = "sha256-sQPJ1IQicHzgjc2l1JYG7ieC+GKvp8cqhwZbL1yU29M=";
   };
 
   patches = [
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   cargoDeps = rustPlatform.fetchCargoVendor {
     pname = "deltachat-core-rust";
     inherit version src;
-    hash = "sha256-nzAQEaTHkKjDmKDmwZEznpvVh1KfxTM83/82hjV/Cpw=";
+    hash = "sha256-EyOT88XEjIVTFv7XGUEsUIu4NcDdD89W5Hbl4xa/urc=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/development/python-modules/deltachat-rpc-client/default.nix b/pkgs/development/python-modules/deltachat-rpc-client/default.nix
index ad33634739ad..d3195678f5c3 100644
--- a/pkgs/development/python-modules/deltachat-rpc-client/default.nix
+++ b/pkgs/development/python-modules/deltachat-rpc-client/default.nix
@@ -21,11 +21,12 @@ buildPythonPackage rec {
 
   build-system = [ setuptools ];
 
-  dependencies = [ imap-tools ];
-
   pythonImportsCheck = [ "deltachat_rpc_client" ];
 
-  nativeCheckInputs = [ pytestCheckHook ];
+  nativeCheckInputs = [
+    imap-tools
+    pytestCheckHook
+  ];
 
   # requires a chatmail server
   doCheck = false;