diff --git a/pydantic_ai_slim/pyproject.toml b/pydantic_ai_slim/pyproject.toml
index a91afca75e..4319de2774 100644
--- a/pydantic_ai_slim/pyproject.toml
+++ b/pydantic_ai_slim/pyproject.toml
@@ -94,7 +94,7 @@ ag-ui = ["ag-ui-protocol>=0.1.8", "starlette>=0.45.3"]
 # Retries
 retries = ["tenacity>=8.2.3"]
 # Temporal
-temporal = ["temporalio>=1.15.0"]
+temporal = ["temporalio==1.15.0"]
 
 [tool.hatch.metadata]
 allow-direct-references = true
diff --git a/uv.lock b/uv.lock
index 69043ee207..8fc0dd23d0 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1,5 +1,5 @@
 version = 1
-revision = 2
+revision = 3
 requires-python = ">=3.9"
 resolution-markers = [
     "python_full_version >= '3.13' and platform_python_implementation == 'PyPy'",
@@ -3571,7 +3571,7 @@ requires-dist = [
     { name = "rich", marker = "extra == 'cli'", specifier = ">=13" },
     { name = "starlette", marker = "extra == 'ag-ui'", specifier = ">=0.45.3" },
     { name = "tavily-python", marker = "extra == 'tavily'", specifier = ">=0.5.0" },
-    { name = "temporalio", marker = "extra == 'temporal'", specifier = ">=1.15.0" },
+    { name = "temporalio", marker = "extra == 'temporal'", specifier = "==1.15.0" },
     { name = "tenacity", marker = "extra == 'retries'", specifier = ">=8.2.3" },
     { name = "typing-inspection", specifier = ">=0.4.0" },
 ]