diff --git a/backend/packages/harness/pyproject.toml b/backend/packages/harness/pyproject.toml
index e6e9db2a9..8c8b5ef93 100644
--- a/backend/packages/harness/pyproject.toml
+++ b/backend/packages/harness/pyproject.toml
@@ -63,7 +63,7 @@ groundroute = []
 ollama = ["langchain-ollama>=0.3.0"]
 postgres = [
     "asyncpg>=0.29",
-    "langgraph-checkpoint-postgres>=3.1.0,<3.2",
+    "langgraph-checkpoint-postgres>=3.1.1,<3.2",
     "psycopg[binary]>=3.3.3",
     "psycopg-pool>=3.3.0",
 ]
diff --git a/backend/uv.lock b/backend/uv.lock
index f386e8612..3fe1033df 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -1020,7 +1020,7 @@ requires-dist = [
     { name = "langfuse", specifier = ">=3.4.1" },
     { 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-postgres", marker = "extra == 'postgres'", specifier = ">=3.1.1,<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" },
@@ -2219,7 +2219,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint-postgres"
-version = "3.1.0"
+version = "3.1.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langgraph-checkpoint" },
@@ -2227,9 +2227,9 @@ dependencies = [
     { name = "psycopg" },
     { name = "psycopg-pool" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/6d/51/5a2dc42e8b5d5942b933b5b7237eae5a4dbc92508a04727c263dd383ad8a/langgraph_checkpoint_postgres-3.1.0.tar.gz", hash = "sha256:02bff4ab63d9dae8eab3a9640fce1d479da8965c9fba7b0dc04cb1f7c56f0a55", size = 148473, upload-time = "2026-05-12T03:40:10.599Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/06/92/1e8959f8cd1b56e672fde3227f6fd642be85af6c5fd662d73921074aa39d/langgraph_checkpoint_postgres-3.1.1.tar.gz", hash = "sha256:d320e147ddad8c374cd546df0b52b532dd54d0541dd9fd23fc738cbd5de76f41", size = 150413, upload-time = "2026-07-30T19:15:39.014Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/2f/cd/eff9b82bc3b5f62d481b437099f44f3ef7b1d907f166fb4ee25e8f84a1e7/langgraph_checkpoint_postgres-3.1.0-py3-none-any.whl", hash = "sha256:814cce2ef35d792bf07b090a95eed004f1acac0724fe6605536b13f6d1e7032c", size = 48988, upload-time = "2026-05-12T03:40:08.925Z" },
+    { url = "https://files.pythonhosted.org/packages/03/32/ba457698a48a0e18d786caa770033067049fbe36d6846f8e50f13b594b51/langgraph_checkpoint_postgres-3.1.1-py3-none-any.whl", hash = "sha256:6e353aecd8150de144fef8e51a49076f58b7d6830d4cf51392b7ad4d79832ba7", size = 50778, upload-time = "2026-07-30T19:15:37.405Z" },
 ]
 
 [[package]]