diff --git a/.jenkins.d/00-deps.sh b/.jenkins.d/00-deps.sh
index 458bbd0..d4d9c33 100755
--- a/.jenkins.d/00-deps.sh
+++ b/.jenkins.d/00-deps.sh
@@ -29,6 +29,6 @@
                              libboost-all-dev libssl-dev libsqlite3-dev
 
     if [[ $JOB_NAME == *"code-coverage" ]]; then
-        sudo apt-get -qy install gcovr lcov libgd-perl
+        sudo apt-get -qy install gcovr lcov
     fi
 fi
diff --git a/.jenkins.d/30-coverage.sh b/.jenkins.d/30-coverage.sh
index 46a6d70..4cce87d 100755
--- a/.jenkins.d/30-coverage.sh
+++ b/.jenkins.d/30-coverage.sh
@@ -23,7 +23,6 @@
 
     genhtml --branch-coverage \
             --demangle-cpp \
-            --frames \
             --legend \
             --output-directory build/coverage \
             --title "ndncert unit tests" \
diff --git a/.travis.yml b/.travis.yml
index 9eb8ffe..8ff6d27 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,6 +24,7 @@
     - env: COMPILER=clang++-8
     - env: COMPILER=clang++-10
     - env: COMPILER=clang++-11
+    - env: COMPILER=clang++-12
 
     # macOS
     - os: osx
@@ -46,7 +47,7 @@
       env: # default compiler
 
   allow_failures:
-    - env: COMPILER=clang++-11
+    - env: COMPILER=clang++-12
 
   fast_finish: true
 
@@ -63,7 +64,7 @@
         # https://apt.llvm.org/
         LLVM_REPO=${COMPILER/clang++/llvm-toolchain-${TRAVIS_DIST}}
         travis_retry wget -nv -O - "https://apt.llvm.org/llvm-snapshot.gpg.key" | sudo apt-key add -
-        travis_retry sudo add-apt-repository -y "deb http://apt.llvm.org/${TRAVIS_DIST}/ ${LLVM_REPO%-11} main"
+        travis_retry sudo add-apt-repository -y "deb http://apt.llvm.org/${TRAVIS_DIST}/ ${LLVM_REPO%-12} main"
         travis_retry sudo apt-get -qq update
         ;;
     esac