diff --git a/flutter-idea/src/io/flutter/FlutterUtils.java b/flutter-idea/src/io/flutter/FlutterUtils.java
index 1a4902ec9a..7895ebc3e7 100644
--- a/flutter-idea/src/io/flutter/FlutterUtils.java
+++ b/flutter-idea/src/io/flutter/FlutterUtils.java
@@ -25,6 +25,7 @@
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.project.ProjectManager;
 import com.intellij.openapi.roots.*;
+import com.intellij.openapi.util.Computable;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.LocalFileSystem;
 import com.intellij.openapi.vfs.VfsUtil;
@@ -117,7 +118,8 @@ public static boolean couldContainWidgets(@Nullable Project project, @Nullable V
            !(file instanceof LightVirtualFile) &&
            isDartFile(file) &&
            file.isInLocalFileSystem() &&
-           ProjectFileIndex.getInstance(project).isInProject(file);
+           ApplicationManager.getApplication().runReadAction(
+             (Computable<Boolean>)()->ProjectFileIndex.getInstance(project).isInProject(file));
   }
 
   public static boolean isDartFile(@NotNull VirtualFile file) {
diff --git a/flutter-idea/src/io/flutter/sdk/FlutterPluginsLibraryManager.java b/flutter-idea/src/io/flutter/sdk/FlutterPluginsLibraryManager.java
index e6c7c64269..70a3831494 100644
--- a/flutter-idea/src/io/flutter/sdk/FlutterPluginsLibraryManager.java
+++ b/flutter-idea/src/io/flutter/sdk/FlutterPluginsLibraryManager.java
@@ -13,6 +13,7 @@
 import com.intellij.openapi.roots.ModuleRootEvent;
 import com.intellij.openapi.roots.ModuleRootListener;
 import com.intellij.openapi.roots.libraries.PersistentLibraryKind;
+import com.intellij.openapi.util.Computable;
 import com.intellij.openapi.vfs.*;
 import com.jetbrains.lang.dart.util.DotPackagesFileUtil;
 import io.flutter.pub.PubRoot;
@@ -137,7 +138,7 @@ private static Set<String> getFlutterPluginPaths(List<PubRoot> roots) {
         if (libFolder == null) {
           continue;
         }
-        final PubRoot pluginRoot = PubRoot.forDirectory(libFolder.getParent());
+        final PubRoot pluginRoot = ApplicationManager.getApplication().runReadAction((Computable<PubRoot>)()->PubRoot.forDirectory(libFolder.getParent()));
         if (pluginRoot == null) {
           continue;
         }