diff --git a/src/lib/actions/ActionRegistry.spec.ts b/src/lib/actions/ActionRegistry.spec.ts
index 47487f85..b00123af 100644
--- a/src/lib/actions/ActionRegistry.spec.ts
+++ b/src/lib/actions/ActionRegistry.spec.ts
@@ -283,6 +283,16 @@ describe("ActionRegistry.registerCustomActions", () => {
       contextType: "proc",
     })
   })
+  it("should ensure proper action naming", () => {
+    expect(() => {
+      actionRegistry.registerCustomActions([
+        {
+          name: "my log",
+          action: (_ctx, args) => args,
+        },
+      ])
+    }).toThrow()
+  })
 })
 
 describe("ActionProvider", () => {
diff --git a/src/lib/actions/ActionRegistry.ts b/src/lib/actions/ActionRegistry.ts
index 0f0735d0..f03e76de 100644
--- a/src/lib/actions/ActionRegistry.ts
+++ b/src/lib/actions/ActionRegistry.ts
@@ -86,7 +86,7 @@ export class ActionRegistry {
   }
 
   public registerCustomActions(actions: ActionRegistration[]) {
-    const nameRegex = "[a-zA-Z0-9]+"
+    const nameRegex = "^[a-zA-Z0-9]+$"
     const regex = new RegExp(nameRegex)
     actions.forEach((customAction) => {
       if (regex.test(customAction.name)) {