diff --git a/pom.xml b/pom.xml
index ef5aa60..1130fe8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -81,7 +81,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -93,19 +93,19 @@
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest-core</artifactId>
-            <version>${hamcrest.version}</version>
+            <version>1.3</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest-library</artifactId>
-            <version>${hamcrest.version}</version>
+            <version>1.3</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest-all</artifactId>
-            <version>${hamcrest.version}</version>
+            <version>1.3</version>
             <scope>test</scope>
         </dependency>
     </dependencies>