diff --git a/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/Dockerfile b/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/Dockerfile
index 4e90052..6249302 100644
--- a/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/Dockerfile
+++ b/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/Dockerfile
@@ -1,11 +1,15 @@
 FROM debian:bullseye-slim
-LABEL maintainer "Andre Peters <andre.peters@servercow.de>"
+LABEL maintainer "The Infrastructure Company GmbH <info@servercow.de>"
 
 ARG DEBIAN_FRONTEND=noninteractive
-ARG DOVECOT=2.3.19.1
+# renovate: datasource=github-tags depName=dovecot/core versioning=semver-coerced extractVersion=^v(?<version>.*)$
+ARG DOVECOT=2.3.21
+# renovate: datasource=github-releases depName=tianon/gosu versioning=semver-coerced extractVersion=^v(?<version>.*)$
+ARG GOSU_VERSION=1.16
 ENV LC_ALL C
 ENV GOSU_VERSION 1.14
 
+
 # Add groups and users before installing Dovecot to not break compatibility
 RUN groupadd -g 5000 vmail \
   && groupadd -g 401 dovecot \
@@ -18,6 +22,7 @@
   && touch /etc/default/locale \
   && apt-get update \
   && apt-get -y --no-install-recommends install \
+  build-essential \
   apt-transport-https \
   ca-certificates \
   cpanminus \
@@ -58,6 +63,7 @@
   libproc-processtable-perl \
   libreadonly-perl \
   libregexp-common-perl \
+  libssl-dev \
   libsys-meminfo-perl \
   libterm-readkey-perl \
   libtest-deep-perl \
@@ -107,6 +113,8 @@
   && apt-get autoclean \
   && rm -rf /var/lib/apt/lists/* \
   && rm -rf /tmp/* /var/tmp/* /root/.cache/
+# imapsync dependencies
+RUN cpan Crypt::OpenSSL::PKCS12
 
 COPY trim_logs.sh /usr/local/bin/trim_logs.sh
 COPY clean_q_aged.sh /usr/local/bin/clean_q_aged.sh
diff --git a/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/docker-entrypoint.sh b/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/docker-entrypoint.sh
index 18746de..b2633c2 100755
--- a/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/docker-entrypoint.sh
+++ b/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/docker-entrypoint.sh
@@ -159,7 +159,7 @@
         VALUES ("%s", 0, "%s", "%s")]], con:escape(req.service), con:escape(req.user), con:escape(req.real_rip)))
       cur:close()
       con:close()
-      return dovecot.auth.PASSDB_RESULT_OK, "password=" .. pass
+      return dovecot.auth.PASSDB_RESULT_OK, ""
     end
     row = cur:fetch (row, "a")
   end
@@ -180,13 +180,13 @@
         if tostring(req.real_rip) == "__IPV4_SOGO__" then
           cur:close()
           con:close()
-          return dovecot.auth.PASSDB_RESULT_OK, "password=" .. pass
+          return dovecot.auth.PASSDB_RESULT_OK, ""
         elseif row.has_prot_access == "1" then
           con:execute(string.format([[REPLACE INTO sasl_log (service, app_password, username, real_rip)
             VALUES ("%s", %d, "%s", "%s")]], con:escape(req.service), row.id, con:escape(req.user), con:escape(req.real_rip)))
           cur:close()
           con:close()
-          return dovecot.auth.PASSDB_RESULT_OK, "password=" .. pass
+          return dovecot.auth.PASSDB_RESULT_OK, ""
         end
       end
       row = cur:fetch (row, "a")
diff --git a/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/imapsync b/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/imapsync
index 0d34504..de63d65 100755
--- a/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/imapsync
+++ b/mailcow/src/mailcow-dockerized/data/Dockerfiles/dovecot/imapsync
@@ -8492,6 +8492,7 @@
         require HTML::Entities ;
         require JSON ;
         require JSON::WebToken::Crypt::RSA ;
+        require Crypt::OpenSSL::PKCS12;
         require Crypt::OpenSSL::RSA ;
         require Encode::Byte ;
         require IO::Socket::SSL ;
@@ -8532,8 +8533,9 @@
 
             $sync->{ debug } and myprint( "Service account: $iss\nKey file: $keyfile\nKey password: $keypass\n");
 
-            # Get private key from p12 file (would be better in perl...)
-            $key = `openssl pkcs12 -in "$keyfile" -nodes -nocerts -passin pass:$keypass -nomacver`;
+            # Get private key from p12 file
+            my $pkcs12 = Crypt::OpenSSL::PKCS12->new_from_file($keyfile);
+            $key = $pkcs12->private_key($keypass);
 
             $sync->{ debug } and myprint( "Private key:\n$key\n");
         }