diff --git a/lib/bootsnap/load_path_cache/change_observer.rb b/lib/bootsnap/load_path_cache/change_observer.rb
index f3d24ebb..ac4d45c2 100644
--- a/lib/bootsnap/load_path_cache/change_observer.rb
+++ b/lib/bootsnap/load_path_cache/change_observer.rb
@@ -16,13 +16,13 @@ def push(*entries)
           super
         end
 
-        def unshift(*entries)
-          @lpc_observer.unshift_paths(self, *entries.map(&:to_s))
+        def append(*entries)
+          @lpc_observer.push_paths(self, *entries.map(&:to_s))
           super
         end
 
-        def concat(entries)
-          @lpc_observer.push_paths(self, *entries.map(&:to_s))
+        def unshift(*entries)
+          @lpc_observer.unshift_paths(self, *entries.map(&:to_s))
           super
         end
 
@@ -31,7 +31,7 @@ def prepend(*entries)
           super
         end
 
-        def append(*entries)
+        def concat(entries)
           @lpc_observer.push_paths(self, *entries.map(&:to_s))
           super
         end