diff --git a/pkgs/shells/bash/nix-bash-completions/default.nix b/pkgs/shells/bash/nix-bash-completions/default.nix
index 739dbd538a6..b76e65ca871 100644
--- a/pkgs/shells/bash/nix-bash-completions/default.nix
+++ b/pkgs/shells/bash/nix-bash-completions/default.nix
@@ -1,14 +1,14 @@
 { stdenv, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
-  version = "0.6.5";
+  version = "0.6.6";
   name = "nix-bash-completions-${version}";
 
   src = fetchFromGitHub {
     owner = "hedning";
     repo = "nix-bash-completions";
     rev = "v${version}";
-    sha256 = "10f70jw81vky52s3fidf7vzl725fihiypsw39825wnkpynayhmrg";
+    sha256 = "1lz9cgacyd4cphr7l90x4hn0ifhxwzz2d5829w1jcglasfacfpsw";
   };
 
   # To enable lazy loading via. bash-completion we need a symlink to the script
diff --git a/pkgs/shells/zsh/nix-zsh-completions/default.nix b/pkgs/shells/zsh/nix-zsh-completions/default.nix
index 2bcff6b809d..8e15476451a 100644
--- a/pkgs/shells/zsh/nix-zsh-completions/default.nix
+++ b/pkgs/shells/zsh/nix-zsh-completions/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitHub }:
 
 let
-  version = "0.3.8";
+  version = "0.3.9";
 in
 
 stdenv.mkDerivation rec {
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     owner = "spwhitt";
     repo = "nix-zsh-completions";
     rev = "${version}";
-    sha256 = "05ynd38br2kn657g7l01jg1q8ja9xwrdyb95w02gh7j9cww2k06w";
+    sha256 = "1ysc9g72yj63ygm915a316f1hcklmgswyrwsq5abwwj48001y01n";
   };
 
   installPhase = ''