diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4da4241..a28b5ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 All notable changes to this project will be documented in this file starting 2021.
 
+## [2.0.1] - 2021-01-31
+
+* Compiler warning removed
+* Documentation
+
 ## [2.0.0] - 2021-01-22 
 
 * CHANGELOG created.
diff --git a/library.properties b/library.properties
index eca4f30..0fe17a6 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=OneButton
-version=2.0.0
+version=2.0.1
 author=Matthias Hertel, mathertel@hotmail.com
 maintainer=Matthias Hertel <http://www.mathertel.de>
 sentence=Arduino library for improving the usage of a singe input button.
diff --git a/src/OneButton.cpp b/src/OneButton.cpp
index d6e0aff..229eab7 100644
--- a/src/OneButton.cpp
+++ b/src/OneButton.cpp
@@ -320,6 +320,10 @@ void OneButton::tick(bool activeLevel)
       reset();
     }
     break;
+
+  default:
+    // nothing to do.
+    break;
   } // if
 
 } // OneButton.tick()