diff --git a/pom.xml b/pom.xml
index 7f096b6..dc54ffb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -56,12 +56,12 @@
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
-      <version>${slf4j.version}</version>
+      <version>1.7.5</version>
     </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-simple</artifactId>
-      <version>${slf4j.version}</version>
+      <artifactId>slf4j-log4j12</artifactId>
+      <version>1.7.5</version>
     </dependency>
     <!-- <dependency>
       <groupId>com.googlecode.lanterna</groupId>