diff --git a/app/build.gradle b/app/build.gradle
index de6503b2..61db81f7 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -69,17 +69,14 @@ android {
         }
     }
 
-    lintOptions {
-        disable 'GoogleAppIndexingWarning'                  // we don't need Google indexing, thanks
-        disable 'ImpliedQuantity', 'MissingQuantity'        // quantities from Transifex may vary
-        disable 'MissingTranslation', 'ExtraTranslation'    // translations from Transifex are not always up to date
-        disable 'RtlEnabled', 'RtlHardcoded'                // RTL not supported yet
-        disable 'Typos'
-        disable 'NullSafeMutableLiveData'                   // crashes lint since Mar 2021
+    lint {
+        disable 'GoogleAppIndexingWarning', 'ImpliedQuantity', 'MissingQuantity', 'MissingTranslation', 'ExtraTranslation', 'RtlEnabled', 'RtlHardcoded', 'Typos', 'NullSafeMutableLiveData'
     }
 
     packagingOptions {
-        exclude 'META-INF/*.md'
+        resources {
+            excludes += ['META-INF/*.md']
+        }
     }
 }
 
diff --git a/build.gradle b/build.gradle
index f73437ff..0c0ac625 100644
--- a/build.gradle
+++ b/build.gradle
@@ -28,7 +28,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.4'
+        classpath 'com.android.tools.build:gradle:7.1.0'
         classpath "com.mikepenz.aboutlibraries.plugin:aboutlibraries-plugin:${versions.aboutLibraries}"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${versions.kotlin}"
     }
diff --git a/cert4android b/cert4android
index fb38e849..d6c73952 160000
--- a/cert4android
+++ b/cert4android
@@ -1 +1 @@
-Subproject commit fb38e84944a034850243f317a5dc088532e25b8b
+Subproject commit d6c73952bc0a8de125c1128e67d476972bfd8882
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index af7be50b..a0f7639f 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-7.1.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/ical4android b/ical4android
index 04dcf5ca..16eba01b 160000
--- a/ical4android
+++ b/ical4android
@@ -1 +1 @@
-Subproject commit 04dcf5ca80a1c6f5efc24bda63633ea4d150ddd0
+Subproject commit 16eba01bb255b8fbd3957a3461c3a62ee3374e45
diff --git a/vcard4android b/vcard4android
index 816e9596..502f2925 160000
--- a/vcard4android
+++ b/vcard4android
@@ -1 +1 @@
-Subproject commit 816e95968c0799c93ffa14657aebe6b966d0591d
+Subproject commit 502f2925037f3cf8c62e659fbeb52ef460c9b1af