diff --git a/godotenv.go b/godotenv.go
index b505f51..19751d7 100644
--- a/godotenv.go
+++ b/godotenv.go
@@ -291,6 +291,13 @@ func parseValue(value string, envMap map[string]string) string {
 		}
 	}
 
+	// expand variables
+	value = os.Expand(value, func(key string) string {
+		if val, ok := envMap[key]; ok {
+			return val
+		}
+		return ""
+	})
 	return value
 }