diff --git a/rebar.config b/rebar.config
index 27cfa1d..6c0bb33 100644
--- a/rebar.config
+++ b/rebar.config
@@ -8,7 +8,7 @@
 
         %% Cuckoo CPU miners (not prebuilt).
         {aecuckoo, {git, "https://github.com/aeternity/aecuckoo.git",
-                    {ref, "695fbbc"}}},
+                    {ref, "996ffcd"}}},
 
         %% This is used just in one place, just to get blake2b_256 hash.
         {enacl, {git, "https://github.com/aeternity/enacl.git",
diff --git a/rebar.lock b/rebar.lock
index 91ae0e2..15ce1f7 100644
--- a/rebar.lock
+++ b/rebar.lock
@@ -1,7 +1,7 @@
 {"1.1.0",
 [{<<"aecuckoo">>,
   {git,"https://github.com/aeternity/aecuckoo.git",
-      {ref,"695fbbc8245dbadab7edf4e4a119f094a5a400d3"}},
+      {ref,"996ffcdb336f1c2254ea8e1b1a657b05b7ea4a81"}},
   0},
  {<<"aecuckooprebuilt">>,
   {aecuckooprebuilt_app_with_priv_from_git,