diff --git a/pkgs/by-name/de/deltachat-desktop/package.nix b/pkgs/by-name/de/deltachat-desktop/package.nix
index 90e01174ddc2..46417136de16 100644
--- a/pkgs/by-name/de/deltachat-desktop/package.nix
+++ b/pkgs/by-name/de/deltachat-desktop/package.nix
@@ -19,17 +19,17 @@
 
 let
   deltachat-rpc-server' = deltachat-rpc-server.overrideAttrs rec {
-    version = "1.156.2";
+    version = "1.157.3";
     src = fetchFromGitHub {
-      owner = "deltachat";
-      repo = "deltachat-core-rust";
+      owner = "chatmail";
+      repo = "core";
       tag = "v${version}";
-      hash = "sha256-CpFnO8stLLTH/XOZZS3j9nVrf2FRekjkQ/R1pmw5o9A=";
+      hash = "sha256-J9Tm35xuyIbHH2HGcctENYbArIlRWe7xzKyF3hGbwNA=";
     };
     cargoDeps = rustPlatform.fetchCargoVendor {
       pname = "deltachat-core-rust";
       inherit version src;
-      hash = "sha256-jrsGMNgKglk+Rq/ZGiZgSZrT4uSA5RjbTYaDtW0Ijyg=";
+      hash = "sha256-BX0TpyG2OJkD5BUIPCij5/g3aRf6FuF9E8y9GM12o7U=";
     };
   };
   electron = electron_34;
@@ -37,18 +37,18 @@ let
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "deltachat-desktop";
-  version = "1.54.2";
+  version = "1.56.0";
 
   src = fetchFromGitHub {
     owner = "deltachat";
     repo = "deltachat-desktop";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-KN8VO03/f143qMBv9Z6K75Mb3S1QQjgzt0psTnBFLyw=";
+    hash = "sha256-XkA1WOMLe0+Fz0wE54KSZWeN+rRqT0TE1PXDppPm6SI=";
   };
 
   pnpmDeps = pnpm.fetchDeps {
     inherit (finalAttrs) pname version src;
-    hash = "sha256-dRnmu5tEqrWn2AizLvd/ZMsiQJP4qtq/+SOSidpzLbY=";
+    hash = "sha256-4VvJNpuO7P6m6BBxBWFebtRsXvqkjdAjmnBwxG+qNns=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/by-name/li/libdeltachat/package.nix b/pkgs/by-name/li/libdeltachat/package.nix
index ff922bf4347d..1a7dcd948788 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 = "1.157.2";
+  version = "1.157.3";
 
   src = fetchFromGitHub {
     owner = "chatmail";
     repo = "core";
     tag = "v${version}";
-    hash = "sha256-BWG3752UA6Ap6lgL4fxwGqqExZzZAGMEFp3d3udfGBk=";
+    hash = "sha256-J9Tm35xuyIbHH2HGcctENYbArIlRWe7xzKyF3hGbwNA=";
   };
 
   patches = [
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   cargoDeps = rustPlatform.fetchCargoVendor {
     pname = "deltachat-core-rust";
     inherit version src;
-    hash = "sha256-YjUfNLpb215Jo1qPfrrklTPLualWdfbEvNXtiz/F5qY=";
+    hash = "sha256-BX0TpyG2OJkD5BUIPCij5/g3aRf6FuF9E8y9GM12o7U=";
   };
 
   nativeBuildInputs = [