diff --git a/TODO.md b/TODO.md
index 3c568dc..4153fc3 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,15 +1,14 @@
 # TODO
 
 ## Features
-- [ ] implement import of non-datalad projects
-- [ ] implement a way to use another backlog repo as a project
+- implement import of non-datalad projects
+- implement a way to use another backlog repo as a project
 
-- [ ] find a way to convey the mathematical structure of what EXACTLY is the form of the correlator in a specific project
+- find a way to convey the mathematical structure of what EXACTLY is the form of the correlator in a specific project
     - this could e.g. be done along the lines of mandatory documentation
-- [ ] keep better track of the versions the code, that was used for a specific measurement.
+- keep better track of the versions of the code, that was used for a specific measurement.
     - maybe let this be an input in the project file?
     - git repo and commit hash/version tag
-- [ ] implement local caching with pickle files
 
 ## Bugfixes
 - [ ] revisit the reimport function for single files
diff --git a/corrlib/meas_io.py b/corrlib/meas_io.py
index 1f1e920..9a3806b 100644
--- a/corrlib/meas_io.py
+++ b/corrlib/meas_io.py
@@ -139,8 +139,8 @@ def load_records(path: str, meas_paths: list[str], preloaded = {}) -> list[Union
     returned_data: list = []
     for file in needed_data.keys():
         for key in list(needed_data[file]):
-            if os.path.exists(cache_path(path, file, key)):
-                returned_data.append(load_object(cache_path(path, file, key)))
+            if os.path.exists(cache_path(path, file, key) + ".p"):
+                returned_data.append(load_object(cache_path(path, file, key) + ".p"))
             else:
                 if file not in preloaded:
                     preloaded[file] = preload(path, file)
@@ -156,13 +156,13 @@ def cache_dir(path, file):
     cache_path_list = [path]
     cache_path_list.append(".cache")
     cache_path_list.extend(file.split("/")[1:])
-    cache_path = os.path.join(cache_path_list)
+    cache_path = "/".join(cache_path_list)
     return cache_path
 
 
 def cache_path(path, file, key):
     cache_path = os.path.join(cache_dir(path, file), key)
-    return cache_path + ".p"
+    return cache_path
 
 
 def preload(path: str, file: str):