diff --git a/pom.xml b/pom.xml
index 68b1a05..733091a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -74,23 +74,23 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>${slf4j-api.version}</version>
+            <version>1.7.14</version>
         </dependency>
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>${guava.version}</version>
+            <version>28.1-jre</version>
         </dependency>
         <dependency>
             <groupId>com.github.phantomthief</groupId>
             <artifactId>more-lambdas</artifactId>
-            <version>${more-lambdas.version}</version>
+            <version>0.1.50</version>
         </dependency>
 
         <dependency>
             <groupId>com.google.code.findbugs</groupId>
             <artifactId>jsr305</artifactId>
-            <version>${jsr305.version}</version>
+            <version>3.0.2</version>
             <scope>provided</scope>
         </dependency>
 
@@ -108,28 +108,28 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>${logback-classic.version}</version>
+            <version>5.8.2</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-math3</artifactId>
-            <version>${commons-math3.version}</version>
+            <version>3.6.1</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-core</artifactId>
-            <version>${jmh.version}</version>
+            <version>1.35</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-generator-annprocess</artifactId>
-            <version>${jmh.version}</version>
+            <version>1.35</version>
             <scope>test</scope>
         </dependency>
     </dependencies>