diff --git a/src/main/java/io/jare/tk/TkApp.java b/src/main/java/io/jare/tk/TkApp.java
index 91b3a6e..c09b506 100644
--- a/src/main/java/io/jare/tk/TkApp.java
+++ b/src/main/java/io/jare/tk/TkApp.java
@@ -62,11 +62,6 @@
 @SuppressWarnings("PMD.ExcessiveImports")
 public final class TkApp extends TkWrap {
 
-    /**
-     * Revision of app.
-     */
-    private static final String REV = Manifests.read("Jare-Revision");
-
     /**
      * Ctor.
      * @param base Base
@@ -176,7 +171,10 @@ private static Take make(final Base base) throws IOException {
                     )
                 )
             ),
-            String.format("X-Jare-Revision: %s", TkApp.REV),
+            String.format(
+                "X-Jare-Revision: %s",
+                Manifests.read("Jare-Revision")
+            ),
             "Vary: Cookie"
         );
     }