diff --git a/src/main/kotlin/io/wusa/GitCommandRunner.kt b/src/main/kotlin/io/wusa/GitCommandRunner.kt
index eb19b48..5844ea9 100644
--- a/src/main/kotlin/io/wusa/GitCommandRunner.kt
+++ b/src/main/kotlin/io/wusa/GitCommandRunner.kt
@@ -36,6 +36,7 @@ class GitCommandRunner {
         private fun startGitProcess(args: Array<String>, projectDir: File): Process {
             return ProcessBuilder("git", *args)
                     .directory(projectDir)
+                    .apply { environment().putAll(System.getenv()) }
                     .redirectOutput(ProcessBuilder.Redirect.PIPE)
                     .redirectError(ProcessBuilder.Redirect.PIPE)
                     .start()