diff --git a/gradle.properties b/gradle.properties
index ecb1b127..20a7f2de 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,7 +2,7 @@ kotlin.code.style=official
 org.gradle.jvmargs=-Xmx4G
 org.gradle.parallel=true
 
-version=1.1.2
+version=1.1.3
 
 asm_version=9.7
 
diff --git a/java-api/src/java12/java/xyz/wagyourtail/jvmdg/j12/stub/java_base/J_N_F_FileSystems.java b/java-api/src/java12/java/xyz/wagyourtail/jvmdg/j12/stub/java_base/J_N_F_FileSystems.java
index ef561854..c627f644 100644
--- a/java-api/src/java12/java/xyz/wagyourtail/jvmdg/j12/stub/java_base/J_N_F_FileSystems.java
+++ b/java-api/src/java12/java/xyz/wagyourtail/jvmdg/j12/stub/java_base/J_N_F_FileSystems.java
@@ -8,6 +8,7 @@
 import java.net.URI;
 import java.nio.file.FileSystem;
 import java.nio.file.FileSystems;
+import java.util.HashMap;
 import java.util.Map;
 
 public class J_N_F_FileSystems {
@@ -17,6 +18,7 @@ public class J_N_F_FileSystems {
     @CoverageIgnore
     @Stub(ref = @Ref("java/nio/file/FileSystems"))
     public static FileSystem newFileSystem(URI uri, Map<String, Object> env) throws IOException {
+        env = new HashMap<>(env);
         env.replaceAll((k, v) -> {
             if (v instanceof Boolean && !k.equals("useTempFile")) {
                 return v.toString();
@@ -29,6 +31,7 @@ public static FileSystem newFileSystem(URI uri, Map<String, Object> env) throws
     @CoverageIgnore
     @Stub(ref = @Ref("java/nio/file/FileSystems"))
     public static FileSystem newFileSystem(URI uri, Map<String, Object> env, ClassLoader loader) throws IOException {
+        env = new HashMap<>(env);
         env.replaceAll((k, v) -> {
             if (v instanceof Boolean && !k.equals("useTempFile")) {
                 return v.toString();
diff --git a/java-api/src/java12/java/xyz/wagyourtail/jvmdg/j12/stub/java_base/J_N_F_S_FileSystemProvider.java b/java-api/src/java12/java/xyz/wagyourtail/jvmdg/j12/stub/java_base/J_N_F_S_FileSystemProvider.java
index 337473d6..8d98c352 100644
--- a/java-api/src/java12/java/xyz/wagyourtail/jvmdg/j12/stub/java_base/J_N_F_S_FileSystemProvider.java
+++ b/java-api/src/java12/java/xyz/wagyourtail/jvmdg/j12/stub/java_base/J_N_F_S_FileSystemProvider.java
@@ -8,6 +8,7 @@
 import java.nio.file.FileSystem;
 import java.nio.file.Path;
 import java.nio.file.spi.FileSystemProvider;
+import java.util.HashMap;
 import java.util.Map;
 
 public class J_N_F_S_FileSystemProvider {
@@ -15,6 +16,7 @@ public class J_N_F_S_FileSystemProvider {
     @Stub
     @CoverageIgnore
     public static FileSystem newFileSystem(FileSystemProvider provider, URI uri, Map<String, Object> env) throws IOException {
+        env = new HashMap<>(env);
         env.replaceAll((k, v) -> {
             if (v instanceof Boolean && !k.equals("useTempFile")) {
                 return v.toString();
@@ -27,6 +29,7 @@ public static FileSystem newFileSystem(FileSystemProvider provider, URI uri, Map
     @Stub
     @CoverageIgnore
     public static FileSystem newFileSystem(FileSystemProvider provider, Path path, Map<String, Object> env) throws IOException {
+        env = new HashMap<>(env);
         env.replaceAll((k, v) -> {
             if (v instanceof Boolean && !k.equals("useTempFile")) {
                 return v.toString();
diff --git a/testing/downgrade/src/main/java/xyz/wagyourtail/downgradetest/TestFile.java b/testing/downgrade/src/main/java/xyz/wagyourtail/downgradetest/TestFile.java
index dadbe38f..a046f8b7 100644
--- a/testing/downgrade/src/main/java/xyz/wagyourtail/downgradetest/TestFile.java
+++ b/testing/downgrade/src/main/java/xyz/wagyourtail/downgradetest/TestFile.java
@@ -5,7 +5,13 @@
 import java.io.FileWriter;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
 import java.nio.file.Files;
+import java.nio.file.StandardOpenOption;
+import java.util.Map;
+
+import static java.nio.file.FileSystems.newFileSystem;
 
 public class TestFile {
 
@@ -28,7 +34,15 @@ public static void main(String[] args) throws IOException {
         }
         reader.close();
         System.out.println(sb.toString());
+
+        var temp2 = Files.createTempFile("temp", ".zip");
+        Files.deleteIfExists(temp2);
+        try (FileSystem fs = FileSystems.newFileSystem(temp2, Map.of("create", "true"))) {
+            Files.writeString(fs.getPath("/test.txt"), "Hello World!", StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
+        }
+
         Files.deleteIfExists(temp);
+        Files.deleteIfExists(temp2);
     }
 
 }