diff --git a/src/utils/vwebutils.cpp b/src/utils/vwebutils.cpp
index e0235b0f..49a0cc92 100644
--- a/src/utils/vwebutils.cpp
+++ b/src/utils/vwebutils.cpp
@@ -926,6 +926,7 @@ QString VWebUtils::copyResource(const QUrl &p_url, const QString &p_folder) cons
     return succ ? targetFile : QString();
 }
 
+// Please use single quote to quote the URI.
 QString VWebUtils::dataURI(const QUrl &p_url, bool p_keepTitle) const
 {
     QString uri;
@@ -961,6 +962,9 @@ QString VWebUtils::dataURI(const QUrl &p_url, bool p_keepTitle) const
         // will be removed in M68, around July 2018. Please use '%23' instead.
         uri.replace("#", "%23");
 
+        // Escape "'" to avoid conflict with src='...' attribute.
+        uri.replace("'", "%27");
+
         if (!p_keepTitle) {
             // Remove <title>...</title>.
             QRegExp reg("<title>.*</title>", Qt::CaseInsensitive);
diff --git a/src/utils/vwebutils.h b/src/utils/vwebutils.h
index 4d446951..4ee9465a 100644
--- a/src/utils/vwebutils.h
+++ b/src/utils/vwebutils.h
@@ -26,6 +26,7 @@ public:
     QString copyResource(const QUrl &p_url, const QString &p_folder) const;
 
     // Return a dataURI of @p_url if it is an image.
+    // Please use single quote to quote the URI.
     QString dataURI(const QUrl &p_url, bool p_keepTitle = true) const;
 
 private: