diff --git a/pkgs/development/tools/documentation/gi-docgen/default.nix b/pkgs/development/tools/documentation/gi-docgen/default.nix
index 7e8c61e1c8d2..e10fc7f8bb26 100644
--- a/pkgs/development/tools/documentation/gi-docgen/default.nix
+++ b/pkgs/development/tools/documentation/gi-docgen/default.nix
@@ -7,7 +7,7 @@
 
 python3.pkgs.buildPythonApplication rec {
   pname = "gi-docgen";
-  version = "2021.7";
+  version = "2021.8";
 
   format = "other";
 
@@ -16,7 +16,7 @@ python3.pkgs.buildPythonApplication rec {
     owner = "GNOME";
     repo = pname;
     rev = version;
-    sha256 = "i2s4JXg+D9sYq1QwVcDRLIr9qnRmzHC+cBInHv4SXHI=";
+    sha256 = "Y1IdCH6bytxbKIj48IAw/3XUQhoqwPshvdj/d1hRS3o=";
   };
 
   nativeBuildInputs = [