diff --git a/src/actions/sources.js b/src/actions/sources.js
index e4437dd..9fa775a 100644
--- a/src/actions/sources.js
+++ b/src/actions/sources.js
@@ -89,7 +89,10 @@ function loadSourceMap(generatedSource) {
       };
     });

-    originalSources.forEach(s => dispatch(newSource(s)));
+    dispatch({
+      type: "ADD_SOURCES",
+      originalSources
+    });
   };
 }

diff --git a/src/actions/types.js b/src/actions/types.js
index 29517bc..0d3f889 100755
--- a/src/actions/types.js
+++ b/src/actions/types.js
@@ -73,6 +73,7 @@ type BreakpointAction =

 type SourceAction =
   { type: "ADD_SOURCE", source: Source }
+  | { type: "ADD_SOURCES", sources: Array<Source> }
   | { type: "SELECT_SOURCE",
       source: Source,
       line?: number,
diff --git a/src/reducers/sources.js b/src/reducers/sources.js
index 1afb757..49da47e 100644
--- a/src/reducers/sources.js
+++ b/src/reducers/sources.js
@@ -52,6 +52,15 @@ function update(state = State(), action: Action) : Record<SourcesState> {
       return state.mergeIn(["sources", action.source.id], source);
     }

+    case "ADD_SOURCES": {
+      const sources: Source = action.sources;
+      sources.forEach(source => {
+        state = state.mergeIn(["sources", action.source.id], source);
+      });
+
+      return state;
+    }
+
     case "SELECT_SOURCE":
       location = {
         line: action.line,