diff --git a/build.gradle b/build.gradle
index f20dde4..e71e29a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,13 +6,14 @@ plugins {
     // Code coverage of tests
     id 'jacoco'
 
-    id "com.github.johnrengelman.shadow" version "6.1.0"
+    id "com.github.johnrengelman.shadow" version "7.0.0"
     id "net.nemerosa.versioning" version "2.14.0"
-    id "nebula.ospackage" version "8.4.1"
+    id "nebula.ospackage" version "8.5.6"
 }
 
 repositories {
-    jcenter()
+    mavenCentral()
+    mavenLocal()
 }
 
 dependencies {
@@ -27,13 +28,13 @@ dependencies {
     implementation 'org.slf4j:slf4j-api:1.7.30'
     implementation 'org.slf4j:slf4j-simple:1.7.30'
 
-    testImplementation 'org.spockframework:spock-core:2.0-M4-groovy-3.0'
+    testImplementation 'org.spockframework:spock-core:2.0-groovy-3.0'
     testImplementation 'com.squareup.okhttp3:mockwebserver:4.9.1'
     testImplementation "org.slf4j:slf4j-simple:1.7.30"
 }
 
 application {
-    mainClassName = 'biz.nellemann.hmci.Application'
+    mainClass.set('biz.nellemann.hmci.Application')
 }
 
 test {
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 62d4c05..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 bb8b2fc..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-6.5.1-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 fbd7c51..4f906e0 100755
--- a/gradlew
+++ b/gradlew
@@ -130,7 +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 5093609..107acd3 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -40,7 +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.
@@ -54,7 +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%
@@ -64,21 +64,6 @@ 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
 
@@ -86,7 +71,7 @@ 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