diff --git a/instantpage.js b/instantpage.js
index 6344e78..fa1ad29 100644
--- a/instantpage.js
+++ b/instantpage.js
@@ -363,6 +363,12 @@ function isPreloadable(anchorElement) {
     return
   }
 
+  // If the href only contains "#", browsers will return empty string instead of "#" when checking anchorElement.hash,
+  // so we have to do an explicit check for it.
+  if (anchorElement.getAttribute('href') === '#') {
+    return;
+  }
+
   if (anchorElement.protocol == 'http:' && location.protocol == 'https:') {
     return
   }
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..ef9a7b8
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,13 @@
+{
+  "name": "instant.page",
+  "version": "5.2.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "instant.page",
+      "version": "5.2.0",
+      "license": "MIT"
+    }
+  }
+}