diff --git a/pom.xml b/pom.xml
index b03dd12..37ff522 100644
--- a/pom.xml
+++ b/pom.xml
@@ -64,21 +64,21 @@
     <dependency>
       <groupId>org.springframework.data</groupId>
       <artifactId>spring-data-mongodb</artifactId>
-      <version>${spring.data.version}</version>
+      <version>4.0.5</version>
       <scope>provided</scope>
     </dependency>
 
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-beans</artifactId>
-      <version>${spring.version}</version>
+      <version>6.0.4</version>
       <scope>provided</scope>
     </dependency>
 
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-core</artifactId>
-      <version>${spring.version}</version>
+      <version>6.0.4</version>
       <scope>provided</scope>
     </dependency>
 
@@ -86,20 +86,20 @@
     <dependency>
       <groupId>org.mongodb</groupId>
       <artifactId>mongodb-driver-reactivestreams</artifactId>
-      <version>${mongo.driver.version}</version>
+      <version>4.8.2</version>
     </dependency>
 
     <dependency>
       <groupId>org.mongodb</groupId>
       <artifactId>mongodb-driver-sync</artifactId>
-      <version>${mongo.driver.version}</version>
+      <version>4.8.2</version>
     </dependency>
 
     <!-- test dependencies -->
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-engine</artifactId>
-      <version>${junit.jupiter.version}</version>
+      <version>5.4.1</version>
       <scope>test</scope>
     </dependency>
 
@@ -113,7 +113,7 @@
     <dependency>
       <groupId>org.junit.platform</groupId>
       <artifactId>junit-platform-launcher</artifactId>
-      <version>${junit.platform.version}</version>
+      <version>1.4.2</version>
       <scope>test</scope>
     </dependency>
 
@@ -126,53 +126,53 @@
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-test</artifactId>
-      <version>${spring.version}</version>
+      <version>6.0.4</version>
       <scope>test</scope>
     </dependency>
 
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-slf4j-impl</artifactId>
-      <version>${log4j.version}</version>
+      <version>2.19.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-1.2-api</artifactId>
-      <version>${log4j.version}</version>
+      <version>2.19.0</version>
       <scope>test</scope>
     </dependency>
 
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-api</artifactId>
-      <version>${log4j.version}</version>
+      <version>2.19.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-core</artifactId>
-      <version>${log4j.version}</version>
+      <version>2.19.0</version>
       <scope>test</scope>
     </dependency>
     <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-reload4j -->
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-reload4j</artifactId>
-      <version>${slf4j.version}</version>
+      <version>2.0.2</version>
       <scope>test</scope>
     </dependency>
 
     <dependency>
       <groupId>com.fasterxml.jackson.dataformat</groupId>
       <artifactId>jackson-dataformat-yaml</artifactId>
-      <version>${jackson.version}</version>
+      <version>2.15.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>
-      <version>${jackson.version}</version>
+      <version>2.13.4.2</version>
       <scope>test</scope>
     </dependency>
   </dependencies>