2 files changed, 5 insertions, 3 deletions

diff --git a/enigma-cli/src/main/java/cuchaz/enigma/command/Command.java b/enigma-cli/src/main/java/cuchaz/enigma/command/Command.java
index 06c49162..53b277f6 100644
--- a/enigma-cli/src/main/java/cuchaz/enigma/command/Command.java
+++ b/enigma-cli/src/main/java/cuchaz/enigma/command/Command.java
@@ -5,6 +5,7 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Locale;
 
 import net.fabricmc.mappingio.MappingReader;
 import net.fabricmc.mappingio.tree.MemoryMappingTree;
@@ -56,7 +57,7 @@ public abstract class Command {
 
         protected static EntryTree<EntryMapping> readMappings(Path path, ProgressListener progress, MappingSaveParameters saveParameters) throws IOException, MappingParseException {
                 // Legacy
-                if (path.getFileName().toString().toLowerCase().endsWith(".zip")) {
+                if (path.getFileName().toString().toLowerCase(Locale.ROOT).endsWith(".zip")) {
                         return MappingFormat.ENIGMA_ZIP.read(path, progress, saveParameters, null);
                 }
 
diff --git a/enigma-cli/src/main/java/cuchaz/enigma/command/MappingCommandsUtil.java b/enigma-cli/src/main/java/cuchaz/enigma/command/MappingCommandsUtil.java
index e1e216a5..7c6bf436 100644
--- a/enigma-cli/src/main/java/cuchaz/enigma/command/MappingCommandsUtil.java
+++ b/enigma-cli/src/main/java/cuchaz/enigma/command/MappingCommandsUtil.java
@@ -4,6 +4,7 @@ import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.Locale;
 
 import net.fabricmc.mappingio.MappingWriter;
 import net.fabricmc.mappingio.tree.VisitableMappingTree;
@@ -34,7 +35,7 @@ public final class MappingCommandsUtil {
                 MappingFormat format = null;
 
                 try {
-                        format = MappingFormat.valueOf(type.toUpperCase());
+                        format = MappingFormat.valueOf(type.toUpperCase(Locale.ROOT));
                 } catch (IllegalArgumentException ignored) {
                         if (type.equals("tinyv2")) {
                                 format = MappingFormat.TINY_V2;
@@ -101,7 +102,7 @@ public final class MappingCommandsUtil {
                 MappingFormat format = null;
 
                 try {
-                        format = MappingFormat.valueOf(type.toUpperCase());
+                        format = MappingFormat.valueOf(type.toUpperCase(Locale.ROOT));
                 } catch (IllegalArgumentException ignored) {
                         // ignored
                 }