diff --git a/stack.yaml b/stack.yaml
index 80e724356..bf681a711 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -54,7 +54,7 @@ extra-deps:
       - uuid-crypto
 
   - git: https://github.com/gkleen/FastCDC.git
-    commit: 7326e2931454282df9081105dad812845db5c530
+    commit: f216e3c0a1efa11a62fd4c9c2db38f7e2b7ac72d
     subdirs:
       - gearhash
       - fastcdc
diff --git a/stack.yaml.lock b/stack.yaml.lock
index e55d4209e..04a0fff8e 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -199,29 +199,29 @@ packages:
 - completed:
     subdir: gearhash
     name: gearhash
-    version: 0.0.0
+    version: 1.0.0
     git: https://github.com/gkleen/FastCDC.git
     pantry-tree:
-      size: 504
-      sha256: 61a08cdd003dc8a418f410dacbcc3a91adea4c23864f8ddbaba3b762e4c2924d
-    commit: 7326e2931454282df9081105dad812845db5c530
+      size: 551
+      sha256: 89c58554f6780bff2a2cab86e94d2f562eea34e8025a9925bfdc25b56c925d3e
+    commit: f216e3c0a1efa11a62fd4c9c2db38f7e2b7ac72d
   original:
     subdir: gearhash
     git: https://github.com/gkleen/FastCDC.git
-    commit: 7326e2931454282df9081105dad812845db5c530
+    commit: f216e3c0a1efa11a62fd4c9c2db38f7e2b7ac72d
 - completed:
     subdir: fastcdc
     name: fastcdc
     version: 0.0.0
     git: https://github.com/gkleen/FastCDC.git
     pantry-tree:
-      size: 244
-      sha256: 80ae3d79344f7c6a73a8d7adf07ff2b7f0736fd34760b4b8a15e26f32d9773f6
-    commit: 7326e2931454282df9081105dad812845db5c530
+      size: 292
+      sha256: aa588b55c7c9c079e39569489a8089ec312f0538d02cf0e1fffe2f0e058566b8
+    commit: f216e3c0a1efa11a62fd4c9c2db38f7e2b7ac72d
   original:
     subdir: fastcdc
     git: https://github.com/gkleen/FastCDC.git
-    commit: 7326e2931454282df9081105dad812845db5c530
+    commit: f216e3c0a1efa11a62fd4c9c2db38f7e2b7ac72d
 - completed:
     name: zip-stream
     version: 0.2.0.1