diff --git a/packages/integrations/src/slack.ts b/packages/integrations/src/slack.ts
index be8d98c8..b6d32e77 100644
--- a/packages/integrations/src/slack.ts
+++ b/packages/integrations/src/slack.ts
@@ -8,18 +8,27 @@ const SLACK_CLIENT_SECRET = process.env.SLACK_CLIENT_SECRET;
 const SLACK_OAUTH_REDIRECT_URL = process.env.SLACK_OAUTH_REDIRECT_URL;
 const SLACK_STATE_SECRET = process.env.SLACK_STATE_SECRET;
 
-export const slackInstaller = new InstallProvider({
-  clientId: SLACK_CLIENT_ID!,
-  clientSecret: SLACK_CLIENT_SECRET!,
-  stateSecret: SLACK_STATE_SECRET,
-  logLevel: process.env.NODE_ENV === 'development' ? LogLevel.DEBUG : undefined,
-});
+export const slackInstaller = SLACK_CLIENT_ID
+  ? new InstallProvider({
+      clientId: SLACK_CLIENT_ID!,
+      clientSecret: SLACK_CLIENT_SECRET!,
+      stateSecret: SLACK_STATE_SECRET,
+      logLevel:
+        process.env.NODE_ENV === 'development' ? LogLevel.DEBUG : undefined,
+    })
+  : ({
+      generateInstallUrl: () => {},
+      stateStore: {},
+    } as unknown as InstallProvider);
 
 export const getSlackInstallUrl = ({
   integrationId,
   organizationId,
   projectId,
 }: { integrationId: string; organizationId: string; projectId: string }) => {
+  if (!SLACK_CLIENT_ID) {
+    throw new Error('SLACK_CLIENT_ID is not set (slack.ts)');
+  }
   return slackInstaller.generateInstallUrl({
     scopes: [
       'incoming-webhook',