diff --git a/antora/package-lock.json b/antora/package-lock.json
index 60990340fa4..5f24a62422b 100644
--- a/antora/package-lock.json
+++ b/antora/package-lock.json
@@ -11,7 +11,7 @@
         "@asciidoctor/tabs": "1.0.0-beta.6",
         "@springio/antora-extensions": "1.8.2",
         "@springio/antora-xref-extension": "1.0.0-alpha.3",
-        "@springio/antora-zip-contents-collector-extension": "1.0.0-alpha.5",
+        "@springio/antora-zip-contents-collector-extension": "1.0.0-alpha.6",
         "@springio/asciidoctor-extensions": "1.0.0-alpha.10"
       }
     },
@@ -338,9 +338,9 @@
       }
     },
     "node_modules/@springio/antora-zip-contents-collector-extension": {
-      "version": "1.0.0-alpha.5",
-      "resolved": "https://registry.npmjs.org/@springio/antora-zip-contents-collector-extension/-/antora-zip-contents-collector-extension-1.0.0-alpha.5.tgz",
-      "integrity": "sha512-idyHpHO5CnvTn4oqw9tPVvv7kf4ycf0mK/XVGW55U2PJACS4jTPkBFZiyy0Nz39ZJSIj6d6am12RZDOMQmwBwQ==",
+      "version": "1.0.0-alpha.6",
+      "resolved": "https://registry.npmjs.org/@springio/antora-zip-contents-collector-extension/-/antora-zip-contents-collector-extension-1.0.0-alpha.6.tgz",
+      "integrity": "sha512-Aqz4SGI3wFYKDOQ770ZqH7kmX0Zu5+f968ASZJU0a9ErV72YOxIxNyIx3YIJ7o6suuwuPAzYpSFmI2aRgrbbfg==",
       "dependencies": {
         "@antora/expand-path-helper": "~2.0",
         "cache-directory": "~2.0",
diff --git a/antora/package.json b/antora/package.json
index 724d0d0f981..588a2406536 100644
--- a/antora/package.json
+++ b/antora/package.json
@@ -8,7 +8,7 @@
     "@antora/atlas-extension": "1.0.0-alpha.2",
     "@springio/antora-extensions": "1.8.2",
     "@springio/antora-xref-extension": "1.0.0-alpha.3",
-    "@springio/antora-zip-contents-collector-extension": "1.0.0-alpha.5",
+    "@springio/antora-zip-contents-collector-extension": "1.0.0-alpha.6",
     "@asciidoctor/tabs": "1.0.0-beta.6",
     "@springio/asciidoctor-extensions": "1.0.0-alpha.10"
   },