diff --git a/server/GameServer/FileWorker.lean b/server/GameServer/FileWorker.lean
index 30829d85..aa1d80a8 100644
--- a/server/GameServer/FileWorker.lean
+++ b/server/GameServer/FileWorker.lean
@@ -489,6 +489,8 @@ section Initialization
     return (ctx,
     { doc             := doc
       initHeaderStx   := headerStx
+      currHeaderStx      := headerStx
+      importCachingTask? := none
       pendingRequests := RBMap.empty
       rpcSessions     := RBMap.empty
     })
diff --git a/server/lake-manifest.json b/server/lake-manifest.json
index 2554a52d..42c2e5a1 100644
--- a/server/lake-manifest.json
+++ b/server/lake-manifest.json
@@ -4,10 +4,10 @@
  [{"url": "https://github.com/leanprover/std4.git",
    "type": "git",
    "subDir": null,
-   "rev": "2e4a3586a8f16713f16b2d2b3af3d8e65f3af087",
+   "rev": "af7f36db6e7e9e395710a70635f915e8e3a0e69b",
    "name": "std",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.3.0",
+   "inputRev": "v4.4.0",
    "inherited": false,
    "configFile": "lakefile.lean"}],
  "name": "GameServer",
diff --git a/server/lean-toolchain b/server/lean-toolchain
index 5cadc9da..26638e09 100644
--- a/server/lean-toolchain
+++ b/server/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.3.0
+leanprover/lean4:v4.4.0