diff --git a/lib/deploy/stepFunctions/compileAlarms.schema.js b/lib/deploy/stepFunctions/compileAlarms.schema.js
index aa05bb94..60b3acfa 100644
--- a/lib/deploy/stepFunctions/compileAlarms.schema.js
+++ b/lib/deploy/stepFunctions/compileAlarms.schema.js
@@ -14,6 +14,17 @@ const arn = Joi.alternatives().try(
       Joi.object(),
     ),
   }),
+  Joi.object().keys({
+    'Fn::Join': Joi.array().items([
+      Joi.string(),
+      Joi.array().items([
+        Joi.string(),
+        Joi.object().keys({
+          Ref: Joi.string(),
+        }),
+      ]),
+    ]),
+  }),
 );
 
 const topics = Joi.object().keys({
diff --git a/lib/deploy/stepFunctions/compileNotifications.schema.js b/lib/deploy/stepFunctions/compileNotifications.schema.js
index 0ed6e8fb..6a42bd87 100644
--- a/lib/deploy/stepFunctions/compileNotifications.schema.js
+++ b/lib/deploy/stepFunctions/compileNotifications.schema.js
@@ -8,6 +8,17 @@ const arn = Joi.alternatives().try(
   Joi.object().keys({
     'Fn::GetAtt': Joi.array().items(Joi.string()),
   }),
+  Joi.object().keys({
+    'Fn::Join': Joi.array().items([
+      Joi.string(),
+      Joi.array().items([
+        Joi.string(),
+        Joi.object().keys({
+          Ref: Joi.string(),
+        }),
+      ]),
+    ]),
+  }),
 );
 
 const sqsWithParams = Joi.object().keys({
diff --git a/lib/deploy/stepFunctions/compileStateMachines.schema.js b/lib/deploy/stepFunctions/compileStateMachines.schema.js
index 13acf79e..391ef62d 100644
--- a/lib/deploy/stepFunctions/compileStateMachines.schema.js
+++ b/lib/deploy/stepFunctions/compileStateMachines.schema.js
@@ -14,6 +14,17 @@ const arn = Joi.alternatives().try(
       Joi.object(),
     ),
   }),
+  Joi.object().keys({
+    'Fn::Join': Joi.array().items([
+      Joi.string(),
+      Joi.array().items([
+        Joi.string(),
+        Joi.object().keys({
+          Ref: Joi.string(),
+        }),
+      ]),
+    ]),
+  }),
 );
 
 const definition = Joi.alternatives().try(