diff --git a/pkgs/development/libraries/lmdb/default.nix b/pkgs/development/libraries/lmdb/default.nix
index ec3e9997690..30703fc7e3e 100644
--- a/pkgs/development/libraries/lmdb/default.nix
+++ b/pkgs/development/libraries/lmdb/default.nix
@@ -3,13 +3,13 @@
 let optional = stdenv.lib.optional;
 in stdenv.mkDerivation rec {
   name = "lmdb-${version}";
-  version = "0.9.19";
+  version = "0.9.21";
 
   src = fetchFromGitHub {
     owner = "LMDB";
     repo = "lmdb";
     rev = "LMDB_${version}";
-    sha256 = "04qx803jdmhkcam748fn0az3cyzvj91lw28kcvwfyq0al7pmjkfs";
+    sha256 = "026a6himvg3y4ssnccdbgr3c2pq3w2d47nayn05v512875z4f2w3";
   };
 
   postUnpack = "sourceRoot=\${sourceRoot}/libraries/liblmdb";