diff --git a/backend/packages/harness/pyproject.toml b/backend/packages/harness/pyproject.toml
index a5255b9b1..0685e2231 100644
--- a/backend/packages/harness/pyproject.toml
+++ b/backend/packages/harness/pyproject.toml
@@ -40,7 +40,7 @@ dependencies = [
     "ddgs>=9.10.0",
     "duckdb>=1.4.4",
     "langchain-google-genai>=4.2.1",
-    "langgraph-checkpoint-sqlite>=3.1.0,<3.2",
+    "langgraph-checkpoint-sqlite>=3.1.1,<3.2",
     "langgraph-sdk>=0.1.51",
     "sqlalchemy[asyncio]>=2.0,<3.0",
     "aiosqlite>=0.19",
diff --git a/backend/uv.lock b/backend/uv.lock
index c30716c8a..ff06b556c 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -1021,7 +1021,7 @@ requires-dist = [
     { name = "langgraph", specifier = ">=1.2.9,<1.3" },
     { name = "langgraph-api", specifier = ">=0.8.1" },
     { name = "langgraph-checkpoint-postgres", marker = "extra == 'postgres'", specifier = ">=3.1.0,<3.2" },
-    { name = "langgraph-checkpoint-sqlite", specifier = ">=3.1.0,<3.2" },
+    { name = "langgraph-checkpoint-sqlite", specifier = ">=3.1.1,<3.2" },
     { name = "langgraph-cli", specifier = ">=0.4.24" },
     { name = "langgraph-runtime-inmem", specifier = ">=0.28.0" },
     { name = "langgraph-sdk", specifier = ">=0.1.51" },
@@ -2234,16 +2234,16 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint-sqlite"
-version = "3.1.0"
+version = "3.1.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "aiosqlite" },
     { name = "langgraph-checkpoint" },
     { name = "sqlite-vec" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/e3/ea/83917c2369acf8a10a894d4247655fd063c07924ba5bc4e83c85d2eaeded/langgraph_checkpoint_sqlite-3.1.0.tar.gz", hash = "sha256:f926916ebc1b985d802cc9c820026036e84db9d910d62c97b57e4ba64f67d5ae", size = 147902, upload-time = "2026-05-12T03:34:52.503Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/54/b1/26fef7572c4fce0322740ef3fcee471510028355d4d4c1d800f0fd432d73/langgraph_checkpoint_sqlite-3.1.1.tar.gz", hash = "sha256:6fcb20db4c37ef7aad52f29b539eb98c38e2dad6fab7c2446a2a9db24f37a70e", size = 146805, upload-time = "2026-07-30T19:19:37.516Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/97/07/b342811a16327900af2747c752ea19676172fcddf9b592cc384031076623/langgraph_checkpoint_sqlite-3.1.0-py3-none-any.whl", hash = "sha256:cc9b40df0076feae8a9ad42ae713621b148b00ac23adc09dc1dc66090a46e5ad", size = 38587, upload-time = "2026-05-12T03:34:51.231Z" },
+    { url = "https://files.pythonhosted.org/packages/f5/b9/e458601a1718337839bcfeec9d1b27b8b16ce135be2bd50ed0395d33a878/langgraph_checkpoint_sqlite-3.1.1-py3-none-any.whl", hash = "sha256:8505c54c94a658080525d7e6780fdd4e0c078ff2566b30d399c02cc9f9af1c63", size = 40785, upload-time = "2026-07-30T19:19:36.424Z" },
 ]
 
 [[package]]