diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 75622d3e..267dfc1e 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-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
\ No newline at end of file
diff --git a/sample_client/build.gradle b/sample_client/build.gradle
index c1bd54a1..c0f96865 100644
--- a/sample_client/build.gradle
+++ b/sample_client/build.gradle
@@ -42,9 +42,4 @@ android {
     packagingOptions {
         exclude 'META-INF/LICENSE.txt'
     }
-    android {
-        lintOptions {
-            abortOnError false
-        }
-    }
 }
diff --git a/sample_client/gradle/wrapper/gradle-wrapper.properties b/sample_client/gradle/wrapper/gradle-wrapper.properties
index 122a0dca..fc5d4423 100644
--- a/sample_client/gradle/wrapper/gradle-wrapper.properties
+++ b/sample_client/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-2.10-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
\ No newline at end of file
diff --git a/test_client/build.gradle b/test_client/build.gradle
index c3f020a0..8d01b841 100644
--- a/test_client/build.gradle
+++ b/test_client/build.gradle
@@ -6,7 +6,6 @@ repositories {
 }
 
 dependencies {
-    implementation 'commons-httpclient:commons-httpclient:3.1'
     implementation project(':')
 }
 
@@ -44,9 +43,4 @@ android {
     packagingOptions {
         exclude 'META-INF/LICENSE.txt'
     }
-    android {
-        lintOptions {
-            abortOnError false
-        }
-    }
 }
diff --git a/test_client/gradle/wrapper/gradle-wrapper.properties b/test_client/gradle/wrapper/gradle-wrapper.properties
index 122a0dca..fc5d4423 100644
--- a/test_client/gradle/wrapper/gradle-wrapper.properties
+++ b/test_client/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-2.10-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
\ No newline at end of file