diff --git a/src/lib/__snapshots__/create-config.test.ts.snap b/src/lib/__snapshots__/create-config.test.ts.snap
index 907f898639..8f03087ac7 100644
--- a/src/lib/__snapshots__/create-config.test.ts.snap
+++ b/src/lib/__snapshots__/create-config.test.ts.snap
@@ -94,6 +94,7 @@ exports[`should create default config 1`] = `
       "proPlanAutoCharge": false,
       "responseTimeWithAppNameKillSwitch": false,
       "segmentContextFieldUsage": false,
+      "slackAppAddon": false,
       "strategySplittedButton": false,
       "strategyVariant": false,
       "strictSchemaValidation": false,
@@ -128,6 +129,7 @@ exports[`should create default config 1`] = `
       "proPlanAutoCharge": false,
       "responseTimeWithAppNameKillSwitch": false,
       "segmentContextFieldUsage": false,
+      "slackAppAddon": false,
       "strategySplittedButton": false,
       "strategyVariant": false,
       "strictSchemaValidation": false,
diff --git a/src/lib/types/experimental.ts b/src/lib/types/experimental.ts
index d3f5066b83..8aa0e0dacc 100644
--- a/src/lib/types/experimental.ts
+++ b/src/lib/types/experimental.ts
@@ -25,7 +25,8 @@ export type IFlagKey =
     | 'customRootRoles'
     | 'strategySplittedButton'
     | 'strategyVariant'
-    | 'newProjectLayout';
+    | 'newProjectLayout'
+    | 'slackAppAddon';
 
 export type IFlags = Partial<{ [key in IFlagKey]: boolean | Variant }>;
 
@@ -118,6 +119,10 @@ const flags: IFlags = {
         process.env.UNLEASH_STRATEGY_VARIANT,
         false,
     ),
+    slackAppAddon: parseEnvVarBoolean(
+        process.env.UNLEASH_SLACK_APP_ADDON,
+        false,
+    ),
 };
 
 export const defaultExperimentalOptions: IExperimentalOptions = {