diff --git a/backend/src/lib/config/env.ts b/backend/src/lib/config/env.ts
index 73a246433..06b60f27e 100644
--- a/backend/src/lib/config/env.ts
+++ b/backend/src/lib/config/env.ts
@@ -147,8 +147,8 @@ const envSchema = z
     PLAIN_WISH_LABEL_IDS: zpStr(z.string().optional()),
     DISABLE_AUDIT_LOG_GENERATION: zodStrBool.default("false"),
     SSL_CLIENT_CERTIFICATE_HEADER_KEY: zpStr(z.string().optional()).default("x-ssl-client-cert"),
-    WORKFLOW_SLACK_CLIENT_ID: zpStr(z.string()).optional(),
-    WORKFLOW_SLACK_CLIENT_SECRET: zpStr(z.string()).optional()
+    WORKFLOW_SLACK_CLIENT_ID: zpStr(z.string().optional()),
+    WORKFLOW_SLACK_CLIENT_SECRET: zpStr(z.string().optional())
   })
   .transform((data) => ({
     ...data,