diff --git a/frontend/src/interfaces/uiConfig.ts b/frontend/src/interfaces/uiConfig.ts
index 6d40b5bf4e..ff4b182832 100644
--- a/frontend/src/interfaces/uiConfig.ts
+++ b/frontend/src/interfaces/uiConfig.ts
@@ -89,6 +89,7 @@ export type UiFlags = {
     newStrategyModal?: boolean;
     globalChangeRequestList?: boolean;
     flagsUiFilterRefactor?: boolean;
+    milestoneProgression?: boolean;
 };
 
 export interface IVersionInfo {
diff --git a/src/lib/types/experimental.ts b/src/lib/types/experimental.ts
index d0d3513281..4cf99a1433 100644
--- a/src/lib/types/experimental.ts
+++ b/src/lib/types/experimental.ts
@@ -60,7 +60,8 @@ export type IFlagKey =
     | 'newStrategyModal'
     | 'globalChangeRequestList'
     | 'newUiConfigService'
-    | 'flagsUiFilterRefactor';
+    | 'flagsUiFilterRefactor'
+    | 'milestoneProgression';
 
 export type IFlags = Partial<{ [key in IFlagKey]: boolean | Variant }>;
 
@@ -277,6 +278,10 @@ const flags: IFlags = {
         process.env.UNLEASH_EXPERIMENTAL_FLAGS_UI_FILTER_REFACTOR,
         false,
     ),
+    milestoneProgression: parseEnvVarBoolean(
+        process.env.UNLEASH_EXPERIMENTAL_MILESTONE_PROGRESSION,
+        false,
+    ),
 };
 
 export const defaultExperimentalOptions: IExperimentalOptions = {
diff --git a/src/server-dev.ts b/src/server-dev.ts
index 1e68b9b30c..b478388c2c 100644
--- a/src/server-dev.ts
+++ b/src/server-dev.ts
@@ -57,6 +57,7 @@ process.nextTick(async () => {
                         globalChangeRequestList: true,
                         newUiConfigService: true,
                         flagsUiFilterRefactor: true,
+                        milestoneProgression: true,
                     },
                 },
                 authentication: {