diff --git a/ci/bump-since.sh b/ci/bump-since.sh
new file mode 100755
index 00000000..a5709b2c
--- /dev/null
+++ b/ci/bump-since.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+if [ ! -z $1 ]; then
+    SINCE="since:$1"
+fi
+bundle exec fastlane bump $SINCE
diff --git a/fastlane/Fastfile b/fastlane/Fastfile
index c309252b..647ccd36 100644
--- a/fastlane/Fastfile
+++ b/fastlane/Fastfile
@@ -23,7 +23,13 @@ logname = "CHANGELOG.txt"
 desc "Bump version"
 lane :bump do |options|
     unless options[:only]
+        if options[:since]
+            between = [options[:since], "HEAD"]
+        else
+            between = nil
+        end
         log = changelog_from_git_commits(
+            between: between,
             pretty: "* %s",
             date_format: "short"
         )