diff --git a/yahpo_gym/CHANGELOG b/yahpo_gym/CHANGELOG
index 417cc58..c83aaa4 100644
--- a/yahpo_gym/CHANGELOG
+++ b/yahpo_gym/CHANGELOG
@@ -1,13 +1,13 @@
 # Version 1.0.2
-* set ONNX provider explicitly
-* require ConfigSpace <= 0.6.1
-* updated documentation and examples and citations of data sources
+* Set ONNX provider explicitly.
+* Require ConfigSpace <= 0.6.1.
+* Updated documentation and examples and citations of data sources.
 
 # Version 1.0.1
 * BenchmarkSet got two new properties
-    * instance : returns the selected instance if available
-    * target_stats : returns (empirically obtained) minimum and maximum for each target
-* Improved unit tests 
+    * instance : returns the selected instance if available.
+    * target_stats : returns (empirically obtained) minimum and maximum for each target.
+* Improved unit tests.
 
 # Version 1.0.0
-* First major release together with publication
+* First major release together with publication.
diff --git a/yahpo_gym_r/NEWS.md b/yahpo_gym_r/NEWS.md
index 6585f62..dc808bd 100644
--- a/yahpo_gym_r/NEWS.md
+++ b/yahpo_gym_r/NEWS.md
@@ -1,11 +1,8 @@
 # yahpogym 1.0.2
-
 * Fixes to make yahpogym work with new bbotk and paradox version 1.0.0
 
 # yahpogym 1.0.1
-
 * Minor usability fixes and updates to documentation
 
 # yahpogym 1.0.0
-
 * First major release together with publication
diff --git a/yahpo_train/CHANGELOG b/yahpo_train/CHANGELOG
new file mode 100644
index 0000000..8e102f9
--- /dev/null
+++ b/yahpo_train/CHANGELOG
@@ -0,0 +1,2 @@
+# Version 0.1.0
+* Initial (experimental) version.