diff --git a/pom.xml b/pom.xml
index 95cd532..bb0529d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -72,25 +72,25 @@
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
-            <version>${lombok.version}</version>
+            <version>1.16.6</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>${jackson.version}</version>
+            <version>2.13.4.2</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.datatype</groupId>
             <artifactId>jackson-datatype-guava</artifactId>
-            <version>${jackson.version}</version>
+            <version>2.19.1</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-validator</artifactId>
-            <version>${hibernate.validator.version}</version>
+            <version>5.2.5.Final</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
@@ -103,14 +103,14 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.2.3</version>
+            <version>1.3.15</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>