diff --git a/charts/langsmith/ci/readonly-config-values.yaml b/charts/langsmith/ci/readonly-config-values.yaml
index 0c66e14..3cad830 100644
--- a/charts/langsmith/ci/readonly-config-values.yaml
+++ b/charts/langsmith/ci/readonly-config-values.yaml
@@ -68,6 +68,13 @@ platformBackend:
         type: RuntimeDefault
       allowPrivilegeEscalation: false
       readOnlyRootFilesystem: true
+    # writeable tmp directory for spooling to disk
+    volumes:
+      - name: tmp
+        emptyDir:
+    volumeMounts:
+      - name: tmp
+        mountPath: /tmp
 
 playground:
   deployment:
diff --git a/charts/langsmith/examples/read_only_config.yaml b/charts/langsmith/examples/read_only_config.yaml
index a344ce8..1839498 100644
--- a/charts/langsmith/examples/read_only_config.yaml
+++ b/charts/langsmith/examples/read_only_config.yaml
@@ -68,6 +68,13 @@ platformBackend:
         type: RuntimeDefault
       allowPrivilegeEscalation: false
       readOnlyRootFilesystem: true
+    # writeable tmp directory for spooling to disk
+    volumes:
+      - name: tmp
+        emptyDir:
+    volumeMounts:
+      - name: tmp
+        mountPath: /tmp
 
 playground:
   deployment: