diff --git a/app/build.gradle b/app/build.gradle
index d73a9c1e..6034fc72 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -61,7 +61,6 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_7
         targetCompatibility JavaVersion.VERSION_1_7
     }
-    buildToolsVersion '25.0.0'
 }
 
 dependencies {
@@ -86,7 +85,7 @@ dependencies {
     compile "com.google.android.gms:play-services-base:${versions.gpsLib}"
     compile "com.google.android.gms:play-services-analytics:${versions.gpsLib}"
     compile(name: 'plotter', ext: 'aar')
-    compile 'com.google.guava:guava:19.0'
+    compile 'com.google.guava:guava:20.0'
     compile('org.simpleframework:simple-xml:2.6.1') {
         exclude(module: 'stax')
         exclude(module: 'stax-api')
diff --git a/build.gradle b/build.gradle
index e1c2c7ad..792cf1d1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,9 +8,9 @@ buildscript {
     }
 
     ext {
-        versions = [supportLib: "24.2.0",
-                    gpsLib    : "9.4.0",
-                    sdk       : [compile: 25, buildTools: "25.0.3", min: 9, target: 25]]
+        versions = [supportLib: "25.3.1",
+                    gpsLib    : "10.2.6",
+                    sdk       : [compile: 25, buildTools: "25.0.3", min: 19, target: 25]]
     }
 }
 
diff --git a/dragbutton/build.gradle b/dragbutton/build.gradle
index e9e5d64d..6ca31d29 100644
--- a/dragbutton/build.gradle
+++ b/dragbutton/build.gradle
@@ -15,7 +15,6 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
-    buildToolsVersion '25.0.0'
 }
 
 dependencies {
diff --git a/jscl/build.gradle b/jscl/build.gradle
index a6643480..6728e968 100644
--- a/jscl/build.gradle
+++ b/jscl/build.gradle
@@ -26,7 +26,7 @@ dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
     compile 'com.google.code.findbugs:annotations:2.0.1'
     compile 'xerces:xercesImpl:2.8.0'
-    compile 'com.google.guava:guava:19.0'
+    compile 'com.google.guava:guava:20.0'
 
     testCompile 'junit:junit:4.12'
     testCompile 'net.sf.opencsv:opencsv:2.0'