diff --git a/pom.xml b/pom.xml
index d2998e7..977664a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
         <jgit.version>4.11.0.201803080745-r</jgit.version>
         <junit.version>5.2.0</junit.version>
         <assertj.version>3.10.0</assertj.version>
-        <mon.version>0.10.0</mon.version>
+        <mon.version>0.11.0</mon.version>
         <mockito.version>2.18.3</mockito.version>
         <java-semver.version>0.9.0</java-semver.version>
         <conditional.version>0.5.0</conditional.version>
diff --git a/src/main/java/net/kemitix/gitdb/impl/LocalGitDBImpl.java b/src/main/java/net/kemitix/gitdb/impl/LocalGitDBImpl.java
index fba081d..6ac5c17 100644
--- a/src/main/java/net/kemitix/gitdb/impl/LocalGitDBImpl.java
+++ b/src/main/java/net/kemitix/gitdb/impl/LocalGitDBImpl.java
@@ -112,7 +112,7 @@ final class LocalGitDBImpl implements GitDB, LocalGitDB {
 
     @Override
     public Result<Maybe<GitDBBranch>> branch(final String name) {
-        return Result.maybeThen(
+        return Result.flatMapMaybe(
                 Result.of(() -> Maybe.maybe(repository.findRef(name))),
                 refMaybe -> Result.invert(refMaybe.map(branchInit)));
     }