1 files changed, 4 insertions, 0 deletions

diff --git a/src/main/java/cuchaz/enigma/command/Command.java b/src/main/java/cuchaz/enigma/command/Command.java
index d53ed6e..09dd321 100644
--- a/src/main/java/cuchaz/enigma/command/Command.java
+++ b/src/main/java/cuchaz/enigma/command/Command.java
@@ -13,6 +13,8 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 
+import com.google.common.io.MoreFiles;
+
 public abstract class Command {
         public final String name;
 
@@ -49,6 +51,8 @@ public abstract class Command {
         protected static MappingFormat chooseEnigmaFormat(Path path) {
                 if (Files.isDirectory(path)) {
                         return MappingFormat.ENIGMA_DIRECTORY;
+                } else if ("zip".equalsIgnoreCase(MoreFiles.getFileExtension(path))) {
+                        return MappingFormat.ENIGMA_ZIP;
                 } else {
                         return MappingFormat.ENIGMA_FILE;
                 }