diff --git a/pkgs/servers/firebird/default.nix b/pkgs/servers/firebird/default.nix
index 83c48b3cd2b4..c0a9e67a4ee8 100644
--- a/pkgs/servers/firebird/default.nix
+++ b/pkgs/servers/firebird/default.nix
@@ -85,13 +85,13 @@ rec {
   firebird_4 = stdenv.mkDerivation (
     base
     // rec {
-      version = "4.0.5";
+      version = "4.0.6";
 
       src = fetchFromGitHub {
         owner = "FirebirdSQL";
         repo = "firebird";
         rev = "v${version}";
-        hash = "sha256-OxkPpmnYTl65ns+hKHJd5IAPUiMj0g3HUpyRpwDNut8=";
+        hash = "sha256-65wfG6huDzvG/tEVllA58OfZqoL4U/ilw5YIDqQywTs=";
       };
 
       nativeBuildInputs = base.nativeBuildInputs ++ [ unzip ];