diff --git a/src/scripts/pagerduty.js b/src/scripts/pagerduty.js
index dcc83fb..2852a31 100644
--- a/src/scripts/pagerduty.js
+++ b/src/scripts/pagerduty.js
@@ -92,7 +92,7 @@ module.exports = function (robot) {
     msg.send("Okay, I've forgotten your PagerDuty email");
   });
 
-  robot.respond(/(pager|major)( me)? incident (.*)$/i, function (msg) {
+  robot.respond(/(pager|major)( me)? incident ([a-z0-9]+)$/i, function (msg) {
     msg.finish();
 
     if (pagerduty.missingEnvironmentForApi(msg)) {
diff --git a/test/pager-me-test.js b/test/pager-me-test.js
index bb77052..5812039 100644
--- a/test/pager-me-test.js
+++ b/test/pager-me-test.js
@@ -35,7 +35,7 @@ describe('pagerduty', function () {
   });
 
   it('registers a pager incident listener', function () {
-    expect(this.robot.respond).to.have.been.calledWith(/(pager|major)( me)? incident (.*)$/i);
+    expect(this.robot.respond).to.have.been.calledWith(/(pager|major)( me)? incident ([a-z0-9]+)$/i);
   });
 
   it('registers a pager sup listener', function () {