diff --git a/pom.xml b/pom.xml
index b192fbf..9ebd1b5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,20 +14,32 @@
         <maven.compiler.target>1.8</maven.compiler.target>
         <lombok.version>1.18.24</lombok.version>
         <jackson.version>2.13.4</jackson.version>
+        <google-jsr305.version>3.0.2</google-jsr305.version>
+        <guava.version>31.1-jre</guava.version>
     </properties>
 
     <dependencies>
         <dependency>
-            <groupId>org.projectlombok</groupId>
-            <artifactId>lombok</artifactId>
-            <version>${lombok.version}</version>
-            <optional>true</optional>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>${google-jsr305.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-annotations</artifactId>
             <version>${jackson.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+            <optional>true</optional>
+        </dependency>
 
         <dependency>
             <groupId>org.junit.jupiter</groupId>