diff --git a/dataforge-gui/gui-workspace/build.gradle b/dataforge-gui/gui-workspace/build.gradle
index 5edc60e..dc89ad8 100644
--- a/dataforge-gui/gui-workspace/build.gradle
+++ b/dataforge-gui/gui-workspace/build.gradle
@@ -16,15 +16,10 @@
 
 plugins{
     id "application"
-    id "com.github.johnrengelman.shadow" version "2.0.4"
 }
+
 apply plugin: 'kotlin'
 
-if (!hasProperty('mainClass')) {
-    ext.mainClass = 'hep.dataforge.plots.demo.DemoApp'//"inr.numass.viewer.test.TestApp"
-}
-
-mainClassName = mainClass
 
 description = "A gui for workspace creation and manipulation"
 
@@ -32,5 +27,9 @@ dependencies {
     compile project(':dataforge-gui')
 }
 
+application{
+    mainClassName = "hep.dataforge.plots.demo.DemoApp"
+}
+
 
 
diff --git a/dataforge-plots/plots-viewer/build.gradle b/dataforge-plots/plots-viewer/build.gradle
index 591aba2..4c25fe2 100644
--- a/dataforge-plots/plots-viewer/build.gradle
+++ b/dataforge-plots/plots-viewer/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'com.github.johnrengelman.shadow' version '2.0.1'
+    id "com.github.johnrengelman.shadow" version "7.0.0"
     id 'application'
 }
 
@@ -7,11 +7,9 @@ apply plugin: "kotlin"
 
 description = 'dataforge-plots-viewer'
 
-if (!hasProperty('mainClass')) {
-    ext.mainClass = 'hep.dataforge.plots.viewer.ViewerApp'
+application{
+    mainClassName("hep.dataforge.plots.viewer.ViewerApp")
 }
-mainClassName = mainClass
-
 
 compileKotlin {
     kotlinOptions {
@@ -20,12 +18,6 @@ compileKotlin {
     }
 }
 
-kotlin {
-    experimental {
-        coroutines "enable"
-    }
-}
-
 dependencies {
     compile project(':dataforge-plots:plots-jfc')
     compile project(':dataforge-gui')
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index cc4fdc2..e708b1c 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 6ce793f..0f80bbf 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.0-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index 2fe81a7..4f906e0 100644
--- a/gradlew
+++ b/gradlew
@@ -82,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -129,6 +130,7 @@ fi
 if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
diff --git a/gradlew.bat b/gradlew.bat
index 9618d8d..107acd3 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -29,6 +29,9 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
@@ -37,7 +40,7 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if "%ERRORLEVEL%" == "0" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -51,7 +54,7 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
@@ -61,28 +64,14 @@ echo location of your Java installation.
 
 goto fail
 
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
 :execute
 @rem Setup the command line
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
 :end
 @rem End local scope for the variables with windows NT shell
diff --git a/grind/grind-terminal/build.gradle b/grind/grind-terminal/build.gradle
index 9ffcc3d..6ecde71 100644
--- a/grind/grind-terminal/build.gradle
+++ b/grind/grind-terminal/build.gradle
@@ -1,13 +1,10 @@
-buildscript {
-    repositories { jcenter() }
-    dependencies {
-        classpath 'com.github.jengelman.gradle.plugins:shadow:2+'
-    }
+plugins {
+    id 'groovy'
+    id 'application'
+    id "com.github.johnrengelman.shadow" version "7.0.0"
 }
 
-apply plugin: 'groovy'
-apply plugin: "application"
-apply plugin: 'com.github.johnrengelman.shadow'
+
 //apply plugin: 'org.openjfx.javafxplugin'
 //
 //javafx {
@@ -15,10 +12,6 @@ apply plugin: 'com.github.johnrengelman.shadow'
 //}
 
 
-if (!hasProperty('mainClass')) {
-    ext.mainClass = 'hep.dataforge.grind.terminal.RunGrindShell'
-}
-mainClassName = mainClass
 
 description = 'The grind plugin for dataforge framework'
 
@@ -32,7 +25,7 @@ dependencies {
 }
 
 task shell(dependsOn: classes, type: JavaExec) {
-    main mainClass
+    main "hep.dataforge.grind.terminal.RunGrindShell"
 //    jvmArgs ['-Djansi.passthrough=true']
     standardInput = System.in
     standardOutput = System.out
@@ -50,4 +43,8 @@ task dumbShell(dependsOn: classes, type: JavaExec) {
     classpath = sourceSets.main.runtimeClasspath
     description "Start a Grind shell with default context in dumb terminal"
     group "dataforge"
+}
+
+application{
+    mainClassName("hep.dataforge.grind.terminal.RunGrindShell")
 }
\ No newline at end of file
diff --git a/numass-control/cryotemp/build.gradle b/numass-control/cryotemp/build.gradle
index 5eeae11..ce91400 100644
--- a/numass-control/cryotemp/build.gradle
+++ b/numass-control/cryotemp/build.gradle
@@ -1,10 +1,7 @@
 apply plugin: 'application'
 apply plugin: 'kotlin'
 
-if (!hasProperty('mainClass')) {
-    ext.mainClass = 'inr.numass.control.cryotemp.PKT8App'
-}
-mainClassName = mainClass
+
 
 version = "0.2.0";
 
@@ -14,8 +11,12 @@ dependencies {
     compile project(':numass-control')
 }
 
+application{
+    mainClassName("inr.numass.control.cryotemp.PKT8App")
+}
+
 task testDevice(dependsOn: classes, type: JavaExec) {
-    main mainClass
+    main "inr.numass.control.cryotemp.PKT8App"
     args = ["--config.resource=config-debug/devices.xml"]
     classpath = sourceSets.main.runtimeClasspath
     description = "Start application in debug mode with default virtual port"
diff --git a/numass-control/vac/build.gradle b/numass-control/vac/build.gradle
index b946744..a36cf0e 100644
--- a/numass-control/vac/build.gradle
+++ b/numass-control/vac/build.gradle
@@ -2,17 +2,16 @@ apply plugin: 'application'
 
 version = "0.6.0"
 
-if (!hasProperty('mainClass')) {
-    ext.mainClass = 'inr.numass.control.readvac.ReadVac'
-}
-mainClassName = mainClass
-
 dependencies {
     compile project(':numass-control')
 }
 
+application{
+    mainClassName("inr.numass.control.readvac.ReadVac")
+}
+
 task testDevice(dependsOn: classes, type: JavaExec) {
-    main mainClass
+    main "inr.numass.control.readvac.ReadVac"
     args = ["--config.resource=config-test/devices.xml"]
     classpath = sourceSets.main.runtimeClasspath
     description "Start application in debug mode with default virtual port"
diff --git a/numass-core/numass-data-proto/build.gradle.kts b/numass-core/numass-data-proto/build.gradle.kts
index 03f95fd..8f9bbdc 100644
--- a/numass-core/numass-data-proto/build.gradle.kts
+++ b/numass-core/numass-data-proto/build.gradle.kts
@@ -5,7 +5,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     idea
     kotlin("jvm")
-    id("com.google.protobuf") version "0.8.8"
+    id("com.google.protobuf") version "0.8.16"
 }
 
 
@@ -14,7 +14,7 @@ repositories {
 }
 
 dependencies {
-    implementation("com.google.protobuf:protobuf-java:3.6.1")
+    implementation("com.google.protobuf:protobuf-java:3.17.1")
     api(project(":numass-core:numass-data-api"))
     api(project(":dataforge-storage"))
 }
@@ -36,7 +36,7 @@ protobuf {
     // Configure the protoc executable
     protoc {
         // Download from repositories
-        artifact = "com.google.protobuf:protoc:3.6.1"
+        artifact = "com.google.protobuf:protoc:3.17.1"
     }
     generatedFilesBaseDir = "$projectDir/gen"
 }
diff --git a/numass-core/numass-signal-processing/src/test/kotlin/inr/numass/data/ChernovProcessorTest.kt b/numass-core/numass-signal-processing/src/test/kotlin/inr/numass/data/ChernovProcessorTest.kt
index 6facc5a..15d8ad6 100644
--- a/numass-core/numass-signal-processing/src/test/kotlin/inr/numass/data/ChernovProcessorTest.kt
+++ b/numass-core/numass-signal-processing/src/test/kotlin/inr/numass/data/ChernovProcessorTest.kt
@@ -12,7 +12,7 @@ class ChernovProcessorTest {
     val events = mapOf<Double, Double>(10.0 to 1.0, 16.0 to 0.5)
 
     val buffer = ShortArray(40) { i ->
-        events.entries.sumByDouble { (pos, amp) -> amp * gaussian.value(pos - i.toDouble()) }.toShort()
+        events.entries.sumByDouble { (pos, amp) -> amp * gaussian.value(pos - i.toDouble()) }.toInt().toShort()
     }
 
     @Test
diff --git a/numass-main/src/main/kotlin/inr/numass/scripts/models/ResolutionDemo.kt b/numass-main/src/main/kotlin/inr/numass/scripts/models/ResolutionDemo.kt
index 0495bbe..7ea847a 100644
--- a/numass-main/src/main/kotlin/inr/numass/scripts/models/ResolutionDemo.kt
+++ b/numass-main/src/main/kotlin/inr/numass/scripts/models/ResolutionDemo.kt
@@ -18,7 +18,6 @@ fun main() {
     Global.output = FXOutputManager()
 
 
-
     val params = ParamSet().apply {
         setPar("N", 8e5, 6.0, 0.0, Double.POSITIVE_INFINITY)
         setPar("bkg", 2.0, 0.03)