diff --git a/pkgs/development/nim-packages/karax/default.nix b/pkgs/development/nim-packages/karax/default.nix
index 8e8f11b228a4..695386826f50 100644
--- a/pkgs/development/nim-packages/karax/default.nix
+++ b/pkgs/development/nim-packages/karax/default.nix
@@ -3,6 +3,6 @@
 fetchFromGitHub {
   owner = "karaxnim";
   repo = "karax";
-  rev = "fa4a2dc";
-  sha256 = "0xl83jsfb9l8kb0nfan9h5y6v96iz4psng2fx06a0qmig4993408";
+  rev = "5cf360c";
+  hash = "sha256-TPwQSqi7ciR6QMklWi/bOJnyzCAT1lZyxW4DTiWTALo=";
 }
diff --git a/pkgs/servers/nitter/default.nix b/pkgs/servers/nitter/default.nix
index df468e61d4ff..aceceae83bc0 100644
--- a/pkgs/servers/nitter/default.nix
+++ b/pkgs/servers/nitter/default.nix
@@ -7,13 +7,13 @@
 
 nimPackages.buildNimPackage rec {
   pname = "nitter";
-  version = "unstable-2023-03-28";
+  version = "unstable-2023-04-21";
 
   src = fetchFromGitHub {
     owner = "zedeus";
     repo = "nitter";
-    rev = "95893eedaa2fb0ca0a0a15257d81b720f7f3eb67";
-    hash = "sha256-nXa8/d8OFFudA4LWpHiCFhnGmvBw2NXMhHMAD9Sp/vk=";
+    rev = "2254a0728c587ebcec51ff08da0bf145606a629e";
+    hash = "sha256-d4KYBCcYbfvEtOqa1umcXmYsBRvhLgpHVoCUfY0XdXI=";
   };
 
   patches = [