diff --git a/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressRange.java b/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressRange.java
index d85acb8774..2cfa7a7183 100644
--- a/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressRange.java
+++ b/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressRange.java
@@ -15,8 +15,9 @@
  */
 package com.github.tomakehurst.wiremock.common;
 
-import com.google.common.net.InetAddresses;
-import java.math.BigInteger;
+import static com.github.tomakehurst.wiremock.common.NetworkAddressUtils.ipToLong;
+import static com.github.tomakehurst.wiremock.common.NetworkAddressUtils.isValidInet4Address;
+
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.util.Objects;
@@ -84,8 +85,8 @@ public String toString() {
 
   private static class IpRange extends NetworkAddressRange {
 
-    private final BigInteger start;
-    private final BigInteger end;
+    private final Long start;
+    private final Long end;
     private final String asString;
 
     private IpRange(String ipRange) {
@@ -93,16 +94,16 @@ private IpRange(String ipRange) {
       if (parts.length != 2) {
         throw new InvalidInputException(Errors.single(18, ipRange + " is not a valid IP range"));
       }
-      this.start = InetAddresses.toBigInteger(parseIpAddress(parts[0]));
-      this.end = InetAddresses.toBigInteger(parseIpAddress(parts[1]));
+      this.start = ipToLong(parseIpAddress(parts[0]));
+      this.end = ipToLong(parseIpAddress(parts[1]));
       this.asString = ipRange;
     }
 
     @Override
     public boolean isIncluded(String testValue) {
       InetAddress testValueAddress = lookup(testValue);
-      BigInteger intVal = InetAddresses.toBigInteger(testValueAddress);
-      return intVal.compareTo(start) >= 0 && intVal.compareTo(end) <= 0;
+      long longValue = ipToLong(testValueAddress);
+      return (longValue >= start && longValue <= end);
     }
 
     @Override
@@ -166,7 +167,7 @@ public boolean isIncluded(String testValue) {
   }
 
   private static InetAddress parseIpAddress(String ipAddress) {
-    if (!InetAddresses.isInetAddress(ipAddress)) {
+    if (!isValidInet4Address(ipAddress)) {
       throw new InvalidInputException(Errors.single(16, ipAddress + " is not a valid IP address"));
     }
 
diff --git a/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressRules.java b/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressRules.java
index 09ba48d4c8..653d730dd3 100644
--- a/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressRules.java
+++ b/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressRules.java
@@ -16,11 +16,11 @@
 package com.github.tomakehurst.wiremock.common;
 
 import static com.github.tomakehurst.wiremock.common.NetworkAddressRange.ALL;
+import static com.github.tomakehurst.wiremock.common.NetworkAddressUtils.isValidInet4Address;
 import static java.util.Collections.emptySet;
 import static java.util.stream.Collectors.toSet;
 
-import com.google.common.collect.ImmutableSet;
-import com.google.common.net.InetAddresses;
+import java.util.HashSet;
 import java.util.Set;
 
 public class NetworkAddressRules {
@@ -34,7 +34,8 @@ public static Builder builder() {
   private final Set<NetworkAddressRange> denied;
   private final Set<NetworkAddressRange> deniedHostPatterns;
 
-  public static NetworkAddressRules ALLOW_ALL = new NetworkAddressRules(Set.of(ALL), emptySet());
+  public static final NetworkAddressRules ALLOW_ALL =
+      new NetworkAddressRules(Set.of(ALL), emptySet());
 
   public NetworkAddressRules(Set<NetworkAddressRange> allowed, Set<NetworkAddressRange> denied) {
     this.allowed =
@@ -78,7 +79,7 @@ private static <T> Set<T> defaultIfEmpty(Set<T> original, Set<T> ifEmpty) {
   }
 
   public boolean isAllowed(String testValue) {
-    if (InetAddresses.isInetAddress(testValue)) {
+    if (isValidInet4Address(testValue)) {
       return allowed.stream().anyMatch(rule -> rule.isIncluded(testValue))
           && denied.stream().noneMatch(rule -> rule.isIncluded(testValue));
     } else {
@@ -88,8 +89,8 @@ public boolean isAllowed(String testValue) {
   }
 
   public static class Builder {
-    private final ImmutableSet.Builder<NetworkAddressRange> allowed = ImmutableSet.builder();
-    private final ImmutableSet.Builder<NetworkAddressRange> denied = ImmutableSet.builder();
+    private final Set<NetworkAddressRange> allowed = new HashSet<>();
+    private final Set<NetworkAddressRange> denied = new HashSet<>();
 
     public Builder allow(String expression) {
       allowed.add(NetworkAddressRange.of(expression));
@@ -102,11 +103,11 @@ public Builder deny(String expression) {
     }
 
     public NetworkAddressRules build() {
-      Set<NetworkAddressRange> allowedRanges = allowed.build();
+      Set<NetworkAddressRange> allowedRanges = allowed;
       if (allowedRanges.isEmpty()) {
         allowedRanges = Set.of(ALL);
       }
-      return new NetworkAddressRules(allowedRanges, denied.build());
+      return new NetworkAddressRules(Set.copyOf(allowedRanges), Set.copyOf(denied));
     }
   }
 }
diff --git a/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressUtils.java b/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressUtils.java
new file mode 100644
index 0000000000..c4c9f31b74
--- /dev/null
+++ b/src/main/java/com/github/tomakehurst/wiremock/common/NetworkAddressUtils.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2023 Thomas Akehurst
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.github.tomakehurst.wiremock.common;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+public class NetworkAddressUtils {
+
+  private NetworkAddressUtils() {}
+
+  public static boolean isValidInet4Address(String ip) {
+    try {
+      return InetAddress.getByName(ip).getHostAddress().equals(ip);
+    } catch (UnknownHostException ex) {
+      return false;
+    }
+  }
+
+  public static long ipToLong(InetAddress ipAddress) {
+    long resultIP = 0;
+    byte[] ipAddressOctets = ipAddress.getAddress();
+
+    for (byte octet : ipAddressOctets) {
+      resultIP <<= 8;
+      resultIP |= octet & 0xFF;
+    }
+    return resultIP;
+  }
+}