diff --git a/archunit/src/main/java/com/tngtech/archunit/library/freeze/ViolationStoreFactory.java b/archunit/src/main/java/com/tngtech/archunit/library/freeze/ViolationStoreFactory.java
index 1a6a76ec4f..4cffcedfc2 100644
--- a/archunit/src/main/java/com/tngtech/archunit/library/freeze/ViolationStoreFactory.java
+++ b/archunit/src/main/java/com/tngtech/archunit/library/freeze/ViolationStoreFactory.java
@@ -19,6 +19,7 @@
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.nio.file.Files;
 import java.util.List;
 import java.util.Properties;
 import java.util.UUID;
@@ -27,7 +28,6 @@
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Joiner;
 import com.google.common.base.Splitter;
-import com.google.common.io.Files;
 import com.tngtech.archunit.ArchConfiguration;
 import com.tngtech.archunit.base.MayResolveTypesViaReflection;
 import com.tngtech.archunit.lang.ArchRule;
@@ -133,7 +133,7 @@ public void save(ArchRule rule, List<String> violations) {
         private void write(List<String> violations, File ruleDetails) {
             String updatedViolations = Joiner.on("\n").join(escape(violations));
             try {
-                Files.write(updatedViolations, ruleDetails, UTF_8);
+                Files.write(ruleDetails.toPath(), updatedViolations.getBytes(UTF_8));
             } catch (IOException e) {
                 throw new StoreUpdateFailedException(e);
             }
diff --git a/archunit/src/test/java/com/tngtech/archunit/core/importer/TestClassFile.java b/archunit/src/test/java/com/tngtech/archunit/core/importer/TestClassFile.java
index 700f9e5747..74ad9eec44 100644
--- a/archunit/src/test/java/com/tngtech/archunit/core/importer/TestClassFile.java
+++ b/archunit/src/test/java/com/tngtech/archunit/core/importer/TestClassFile.java
@@ -2,8 +2,7 @@
 
 import java.io.File;
 import java.io.IOException;
-
-import com.google.common.io.Files;
+import java.nio.file.Files;
 
 import static com.google.common.base.Preconditions.checkState;
 import static com.tngtech.archunit.testutil.TestUtils.newTemporaryFolder;
@@ -26,7 +25,7 @@ public TestClassFile create() {
 
             checkState(sourceFile.getParentFile().exists() || sourceFile.getParentFile().mkdirs(),
                     "Can't create directory %s", sourceFile.getParentFile().getAbsolutePath());
-            Files.write(sourceCode, sourceFile, UTF_8);
+            Files.write(sourceFile.toPath(), sourceCode.getBytes(UTF_8));
 
             int result = getSystemJavaCompiler().run(null, null, null, sourceFile.getAbsolutePath());
             checkState(result == 0, "Compiler exit code should be 0, but it was " + result);
diff --git a/archunit/src/test/java/com/tngtech/archunit/testutil/ReplaceFileRule.java b/archunit/src/test/java/com/tngtech/archunit/testutil/ReplaceFileRule.java
index d35482d2c0..cadfd5c209 100644
--- a/archunit/src/test/java/com/tngtech/archunit/testutil/ReplaceFileRule.java
+++ b/archunit/src/test/java/com/tngtech/archunit/testutil/ReplaceFileRule.java
@@ -3,6 +3,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.nio.charset.Charset;
+import java.nio.file.Files;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.LinkedList;
@@ -13,12 +14,13 @@
 import org.junit.rules.ExternalResource;
 
 import static com.google.common.base.Preconditions.checkState;
+import static java.nio.file.StandardOpenOption.APPEND;
+import static java.nio.file.StandardOpenOption.WRITE;
 
 public class ReplaceFileRule extends ExternalResource {
     private final File tempDir = TestUtils.newTemporaryFolder();
 
     private final List<FileAction> fileActions = new ArrayList<>();
-    private final List<MoveAction> moveActions = new ArrayList<>();
     private final Set<File> replacedFiles = new HashSet<>();
 
     public void replace(File target, String content, Charset charset) {
@@ -56,7 +58,7 @@ private void write(File target, String content, Charset charset) {
 
     private void append(File file, String line, Charset charset) {
         try {
-            com.google.common.io.Files.append(System.lineSeparator() + line, file, charset);
+            Files.write(file.toPath(), (System.lineSeparator() + line).getBytes(charset), WRITE, APPEND);
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
@@ -64,7 +66,6 @@ private void append(File file, String line, Charset charset) {
 
     private void addMoveAction(MoveAction moveAction) {
         fileActions.add(moveAction);
-        moveActions.add(moveAction);
     }
 
     @Override
@@ -102,7 +103,7 @@ public void revert() {
 
         private void move(File origin, File target) {
             try {
-                java.nio.file.Files.move(origin.toPath(), target.toPath());
+                Files.move(origin.toPath(), target.toPath());
             } catch (IOException e) {
                 throw new RuntimeException(e);
             }
@@ -142,7 +143,7 @@ private CreateFileAction(File target, String content, Charset charset) {
         @Override
         public FileAction execute() {
             try {
-                com.google.common.io.Files.write(content, target, charset);
+                Files.write(target.toPath(), content.getBytes(charset));
             } catch (IOException e) {
                 throw new RuntimeException(e);
             }