diff --git a/build.gradle b/build.gradle
index f840f85a..7a11f50b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ apply plugin: 'idea'
 
 
 group = 'cz.siret'
-version = '2.1-dev1'
+version = '2.1-dev.1'
 
 description = 'Ligand binding site prediction based on machine learning.'