diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..11b5ff66
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,3 @@
+# 0.0.13
+- Fixes bug that prevented users wih git versions below 2.21 to be able to use 'mob'.
+ 
\ No newline at end of file
diff --git a/mob.go b/mob.go
index 281a07ac..6326c76b 100644
--- a/mob.go
+++ b/mob.go
@@ -10,7 +10,7 @@ import (
 	"time"
 )
 
-const versionNumber = "0.0.12"
+const versionNumber = "0.0.13"
 
 var wipBranch = "mob-session"                 // override with MOB_WIP_BRANCH environment variable
 var baseBranch = "master"                     // override with MOB_BASE_BRANCH environment variable
@@ -394,7 +394,8 @@ func gitRemoteBranches() string {
 }
 
 func gitCurrentBranch() string {
-	return strings.TrimSpace(silentgit("branch", "--show-current"))
+	// upgrade to branch --show-current when git v2.21 is more widely spread
+	return strings.TrimSpace(silentgit("rev-parse", "--abbrev-ref", "HEAD"))
 }
 
 func gitUserName() string {