diff --git a/lake-manifest.json b/lake-manifest.json
index 5e397fe..3e42a95 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -15,10 +15,10 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "4d73b99262f1ce80a33ac832bef26549cf3c2034",
+   "rev": "1966d39af5b7b40e8e971b8a83f72a2895381dba",
    "name": "auto",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "4d73b99262f1ce80a33ac832bef26549cf3c2034",
+   "inputRev": "1966d39af5b7b40e8e971b8a83f72a2895381dba",
    "inherited": false,
    "configFile": "lakefile.lean"}],
  "name": "Duper",
diff --git a/lakefile.lean b/lakefile.lean
index 93fcd38..c86aae0 100644
--- a/lakefile.lean
+++ b/lakefile.lean
@@ -2,7 +2,7 @@ import Lake
 
 open Lake DSL
 
-require auto from git "https://github.com/leanprover-community/lean-auto.git"@"4d73b99262f1ce80a33ac832bef26549cf3c2034"
+require auto from git "https://github.com/leanprover-community/lean-auto.git"@"1966d39af5b7b40e8e971b8a83f72a2895381dba"
 require batteries from git "https://github.com/leanprover-community/batteries" @ "v4.14.0"
 
 package Duper {