diff --git a/build.gradle b/build.gradle
index de6b314..ec039b1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -12,7 +12,7 @@ repositories {
 }
 
 group = 'net.tokensmith'
-version = '1.3.3'
+version = '1.3.4-SNAPSHOT'
 description = 'Java implementation of JWT'
 
 sourceCompatibility = 12
@@ -21,7 +21,7 @@ targetCompatibility = 12
 ext {
     jacksonVersion = '2.11.0'
     log4jVersion = '2.13.3'
-    slf4jVersion = '1.7.30'
+    slf4jVersion = '1.7.25'
     mockitoVersion = '2.28.2'
 }
 
@@ -30,14 +30,15 @@ dependencies {
     implementation "com.fasterxml.jackson.core:jackson-databind:${jacksonVersion}"
     implementation "com.fasterxml.jackson.datatype:jackson-datatype-jdk8:${jacksonVersion}"
     implementation "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:${jacksonVersion}"
-    compile "org.slf4j:slf4j-simple:${slf4jVersion}"
-    compile "org.apache.logging.log4j:log4j-1.2-api:${log4jVersion}"
-    compile "org.apache.logging.log4j:log4j-api:${log4jVersion}"
-    compile "org.apache.logging.log4j:log4j-core:${log4jVersion}"
+
+    compile group: 'org.slf4j', name: 'slf4j-api', version: "${slf4jVersion}"
 
     testImplementation group: 'junit', name: 'junit', version:'4.12'
     testImplementation group: 'org.hamcrest', name: 'hamcrest-all', version:'1.3'
     testCompile "org.mockito:mockito-core:${mockitoVersion}"
+    testCompile group: 'org.apache.logging.log4j', name: 'log4j-slf4j-impl', version: "${log4jVersion}"
+    testCompile group: 'org.apache.logging.log4j', name: 'log4j-api', version: "${log4jVersion}"
+    testCompile group: 'org.apache.logging.log4j', name: 'log4j-core', version: "${log4jVersion}"
 }
 
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 770701f..ae8df0d 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-all.zip