diff --git a/CHANGELOG.md b/CHANGELOG.md
index c343549..5342655 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+* [PR-10](https://github.com/rimi-itk/gh-itkdev/pull/10)
+  Added release base branch detection
 * [PR-7](https://github.com/rimi-itk/gh-itkdev/pull/7)
   Fixed URL parsing
 
diff --git a/cmd/changelog.go b/cmd/changelog.go
index f7dbb87..0296ac2 100644
--- a/cmd/changelog.go
+++ b/cmd/changelog.go
@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"fmt"
+	"os/exec"
 
 	"github.com/rimi-itk/gh-itkdev/changelog"
 	"github.com/spf13/cobra"
@@ -16,8 +17,19 @@ var (
   {{ .Title }}`
 
 	release    string
-	baseBranch string = "develop"
-	commit     bool   = false
+	baseBranch string = func() string {
+		branches := []string{"develop", "main", "master"}
+		for _, branch := range branches {
+			cmd := exec.Command("git", "rev-parse", "--verify", "--branch", branch)
+			if _, err := cmd.CombinedOutput(); err == nil {
+				return branch
+			}
+		}
+
+		// Fallback if no other suitable branch is found.
+		return branches[0]
+	}()
+	commit bool = false
 
 	changelogName string = "CHANGELOG.md"