diff --git a/app/build.gradle b/app/build.gradle
index 4c9438ed8ee5..3eecce87a16a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -356,7 +356,7 @@ dependencies {
 
     implementation 'org.osmdroid:osmdroid-android:6.1.20'
 
-    implementation('org.mnode.ical4j:ical4j:3.0.0') {
+    implementation('org.mnode.ical4j:ical4j:4.0.5') {
         ['org.apache.commons', 'commons-logging'].each {
             exclude group: "$it"
         }
diff --git a/gradle/verification-metadata.xml b/gradle/verification-metadata.xml
index d10dd5fc4f5b..e078a1a0c21a 100644
--- a/gradle/verification-metadata.xml
+++ b/gradle/verification-metadata.xml
@@ -12,6 +12,7 @@
          <ignored-key id="0AA3E5C3D232E79B" reason="Key couldn't be downloaded from any key server"/>
          <ignored-key id="23778689FBFBE047" reason="Key couldn't be downloaded from any key server"/>
          <ignored-key id="5C504E1210E49773" reason="Key couldn't be downloaded from any key server"/>
+         <ignored-key id="72385FF0AF338D52" reason="Key couldn't be downloaded from any key server"/>
       </ignored-keys>
       <trusted-keys>
          <trusted-key id="015479E1055341431B4545AB72475FD306B9CAB7" group="com.googlecode.javaewah" name="JavaEWAH" version="1.2.3"/>
@@ -330,6 +331,7 @@
          <trusted-key id="D4C89EA4AAF455FD88B22087EFE8086F9E93774E" group="junit" name="junit" version="4.12"/>
          <trusted-key id="D54A395B5CF3F86EB45F6E426B1B008864323B92" group="org.antlr"/>
          <trusted-key id="D6F1BC78607808EC8E9F69437A8860944FAD5F62" group="org.apache.commons" name="commons-parent"/>
+         <trusted-key id="D71534DDED75B2DA189E14DF385EF0846E5CF3F3" group="org.mnode.ical4j" name="ical4j" version="4.0.5"/>
          <trusted-key id="D75E25B78EBB19E47C0A99BCA7764F502A938C99" group="com.google.protobuf"/>
          <trusted-key id="DA7A1BB85B19E4FB05073431205C8673DC742C7C" group="org.apache" name="apache" version="9"/>
          <trusted-key id="DB0597E3144342256BC81E3EC727D053C4481CF5" group="org.tensorflow" name="tensorflow-lite-metadata"/>
@@ -8037,10 +8039,10 @@
       </component>
       <component group="com.github.nextcloud.android-common" name="core" version="0.23.2">
          <artifact name="core-0.23.2.aar">
-            <sha256 value="38011f3adff2f68c6c99cb121a5def63cc44a66e393373203687b59c5fb82ce8" origin="Generated by Gradle"/>
+            <sha256 value="38011f3adff2f68c6c99cb121a5def63cc44a66e393373203687b59c5fb82ce8" origin="Generated by Gradle" reason="Artifact is not signed"/>
          </artifact>
          <artifact name="core-0.23.2.module">
-            <sha256 value="16df4da63602c412d8712018c4b35ce24cb040761bcbc026fbcd836dbe953171" origin="Generated by Gradle"/>
+            <sha256 value="16df4da63602c412d8712018c4b35ce24cb040761bcbc026fbcd836dbe953171" origin="Generated by Gradle" reason="Artifact is not signed"/>
          </artifact>
       </component>
       <component group="com.github.nextcloud.android-common" name="core" version="df2f116806">
@@ -8101,10 +8103,10 @@
       </component>
       <component group="com.github.nextcloud.android-common" name="material-color-utilities" version="0.23.2">
          <artifact name="material-color-utilities-0.23.2.jar">
-            <sha256 value="7b6296e966f1baf3da2443f61cc9d501e3ed06667ae9ef5603e550f705d89334" origin="Generated by Gradle"/>
+            <sha256 value="7b6296e966f1baf3da2443f61cc9d501e3ed06667ae9ef5603e550f705d89334" origin="Generated by Gradle" reason="Artifact is not signed"/>
          </artifact>
          <artifact name="material-color-utilities-0.23.2.module">
-            <sha256 value="ca3c0835e5534a549d3718380982ba8cead70613ca436d65606f16cd2e3a0f01" origin="Generated by Gradle"/>
+            <sha256 value="ca3c0835e5534a549d3718380982ba8cead70613ca436d65606f16cd2e3a0f01" origin="Generated by Gradle" reason="Artifact is not signed"/>
          </artifact>
       </component>
       <component group="com.github.nextcloud.android-common" name="material-color-utilities" version="df2f116806">
@@ -8165,10 +8167,10 @@
       </component>
       <component group="com.github.nextcloud.android-common" name="ui" version="0.23.2">
          <artifact name="ui-0.23.2.aar">
-            <sha256 value="9eaf161c0535e87fec9585d97b5d5244229c7fdbde348bfebf7747f5bcd3f952" origin="Generated by Gradle"/>
+            <sha256 value="9eaf161c0535e87fec9585d97b5d5244229c7fdbde348bfebf7747f5bcd3f952" origin="Generated by Gradle" reason="Artifact is not signed"/>
          </artifact>
          <artifact name="ui-0.23.2.module">
-            <sha256 value="4af371de8c6cd41a24f1a3ade9cd010c5d226a583d95ff909b1ca80f02d86db6" origin="Generated by Gradle"/>
+            <sha256 value="4af371de8c6cd41a24f1a3ade9cd010c5d226a583d95ff909b1ca80f02d86db6" origin="Generated by Gradle" reason="Artifact is not signed"/>
          </artifact>
       </component>
       <component group="com.github.nextcloud.android-common" name="ui" version="df2f116806">
@@ -15211,6 +15213,14 @@
             </sha256>
          </artifact>
       </component>
+      <component group="org.threeten" name="threeten-extra" version="1.8.0">
+         <artifact name="threeten-extra-1.8.0.jar">
+            <sha256 value="51e4d21edc4e9447f7760c050e0baee75d7d973f387ba605a17abdc4d24fd6d8" origin="Generated by Gradle" reason="A key couldn't be downloaded"/>
+         </artifact>
+         <artifact name="threeten-extra-1.8.0.pom">
+            <sha256 value="a5d8cdf2592bda1ef405965883db2da431b267c76de300d075821e20f6dc0c7d" origin="Generated by Gradle" reason="A key couldn't be downloaded"/>
+         </artifact>
+      </component>
       <component group="org.tukaani" name="xz" version="1.9">
          <artifact name="xz-1.9.jar">
             <sha256 value="211b306cfc44f8f96df3a0a3ddaf75ba8c5289eed77d60d72f889bb855f535e5" origin="Generated by Gradle"/>