diff --git a/src/com/zenuml/sequence/plugins/jetbrains/actions/OpenInBrowserAction.java b/src/com/zenuml/sequence/plugins/jetbrains/actions/OpenInBrowserAction.java
index 77d6ca7..843e1ad 100644
--- a/src/com/zenuml/sequence/plugins/jetbrains/actions/OpenInBrowserAction.java
+++ b/src/com/zenuml/sequence/plugins/jetbrains/actions/OpenInBrowserAction.java
@@ -1,6 +1,7 @@
 package com.zenuml.sequence.plugins.jetbrains.actions;
 
 import com.intellij.ide.BrowserUtil;
+import com.intellij.openapi.actionSystem.ActionUpdateThread;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
 import org.intellij.plugins.markdown.ui.actions.MarkdownActionUtil;
@@ -18,6 +19,11 @@ public OpenInBrowserAction() {
         super(TITLE);
     }
 
+    @Override
+    public @NotNull ActionUpdateThread getActionUpdateThread() {
+        return ActionUpdateThread.EDT;
+    }
+
     public void actionPerformed(@NotNull AnActionEvent anActionEvent) {
         SplitFileEditor splitEditor = MarkdownActionUtil.findSplitEditor(anActionEvent);
         MarkdownPreviewFileEditor markdownPreviewFileEditor = (MarkdownPreviewFileEditor) splitEditor.getSecondEditor();