diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 772ddeb12a..15a7693b40 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -75,8 +75,8 @@ stages:
 
 # Alpine Linux
 
-.alpine-3.11-amd64: &alpine_3_11_amd64_image
-  image: "$CI_REGISTRY_IMAGE:alpine-3.11-amd64"
+.alpine-3.12-amd64: &alpine_3_12_amd64_image
+  image: "$CI_REGISTRY_IMAGE:alpine-3.12-amd64"
   <<: *linux_amd64
 
 # CentOS
@@ -123,8 +123,8 @@ stages:
 
 # Fedora
 
-.fedora-31-amd64: &fedora_31_amd64_image
-  image: "$CI_REGISTRY_IMAGE:fedora-31-amd64"
+.fedora-32-amd64: &fedora_32_amd64_image
+  image: "$CI_REGISTRY_IMAGE:fedora-32-amd64"
   <<: *linux_amd64
 
 # Ubuntu
@@ -133,8 +133,8 @@ stages:
   image: "$CI_REGISTRY_IMAGE:ubuntu-xenial-amd64"
   <<: *linux_amd64
 
-.ubuntu-bionic-amd64: &ubuntu_bionic_amd64_image
-  image: "$CI_REGISTRY_IMAGE:ubuntu-bionic-amd64"
+.ubuntu-focal-amd64: &ubuntu_focal_amd64_image
+  image: "$CI_REGISTRY_IMAGE:ubuntu-focal-amd64"
   <<: *linux_amd64
 
 # Base image
@@ -507,28 +507,28 @@ push:docs:
     - main@isc-projects/bind9
     - /^v9_[1-9][0-9]$/@isc-projects/bind9
 
-# Jobs for regular GCC builds on Alpine Linux 3.11 (amd64)
+# Jobs for regular GCC builds on Alpine Linux 3.12 (amd64)
 
-gcc:alpine3.11:amd64:
+gcc:alpine3.12:amd64:
   variables:
     CC: gcc
     CFLAGS: "${CFLAGS_COMMON}"
     EXTRA_CONFIGURE: "--enable-dnstap"
-  <<: *alpine_3_11_amd64_image
+  <<: *alpine_3_12_amd64_image
   <<: *build_job
 
-system:gcc:alpine3.11:amd64:
-  <<: *alpine_3_11_amd64_image
+system:gcc:alpine3.12:amd64:
+  <<: *alpine_3_12_amd64_image
   <<: *system_test_job
   needs:
-    - job: gcc:alpine3.11:amd64
+    - job: gcc:alpine3.12:amd64
       artifacts: true
 
-unit:gcc:alpine3.11:amd64:
-  <<: *alpine_3_11_amd64_image
+unit:gcc:alpine3.12:amd64:
+  <<: *alpine_3_12_amd64_image
   <<: *unit_test_job
   needs:
-    - job: gcc:alpine3.11:amd64
+    - job: gcc:alpine3.12:amd64
       artifacts: true
 
 # Jobs for regular GCC builds on CentOS 6 (amd64)
@@ -820,7 +820,7 @@ gcc:tumbleweed:amd64:
   variables:
     CC: gcc
     CFLAGS: "${CFLAGS_COMMON}"
-    EXTRA_CONFIGURE: "--with-libidn2 --with-python"
+    EXTRA_CONFIGURE: "--with-libidn2 --with-python --with-gssapi=/usr/lib/mit/bin/krb5-config"
   <<: *tumbleweed_latest_amd64_image
   <<: *build_job
 
@@ -862,28 +862,28 @@ unit:gcc:xenial:amd64:
     - job: gcc:xenial:amd64
       artifacts: true
 
-# Jobs for regular GCC builds on Ubuntu 18.04 Bionic Beaver (amd64)
+# Jobs for regular GCC builds on Ubuntu 20.04 Focal Fossa (amd64)
 
-gcc:bionic:amd64:
+gcc:focal:amd64:
   variables:
     CC: gcc
     CFLAGS: "${CFLAGS_COMMON} -Og"
     EXTRA_CONFIGURE: "--with-libidn2"
-  <<: *ubuntu_bionic_amd64_image
+  <<: *ubuntu_focal_amd64_image
   <<: *build_job
 
-system:gcc:bionic:amd64:
-  <<: *ubuntu_bionic_amd64_image
+system:gcc:focal:amd64:
+  <<: *ubuntu_focal_amd64_image
   <<: *system_test_job
   needs:
-    - job: gcc:bionic:amd64
+    - job: gcc:focal:amd64
       artifacts: true
 
-unit:gcc:bionic:amd64:
-  <<: *ubuntu_bionic_amd64_image
+unit:gcc:focal:amd64:
+  <<: *ubuntu_focal_amd64_image
   <<: *unit_test_job
   needs:
-    - job: gcc:bionic:amd64
+    - job: gcc:focal:amd64
       artifacts: true
 
 # Jobs for ASAN builds on Debian 10 "buster" (amd64)
@@ -1070,54 +1070,56 @@ unit:gcc:softhsm2.4:
     - job: gcc:softhsm2.4
       artifacts: true
 
-# Jobs for PKCS#11-enabled GCC builds on Fedora 31 (amd64)
+# Jobs for PKCS#11-enabled GCC builds on Fedora 32 (amd64)
 
 gcc:softhsm2.6:
   variables:
     CC: gcc
     CFLAGS: "${CFLAGS_COMMON} -O1"
     EXTRA_CONFIGURE: "--with-libidn2 --enable-native-pkcs11 --with-pkcs11=/usr/lib64/pkcs11/libsofthsm2.so"
-  <<: *fedora_31_amd64_image
+  <<: *fedora_32_amd64_image
   <<: *build_job
 
 system:gcc:softhsm2.6:
-  <<: *fedora_31_amd64_image
+  <<: *fedora_32_amd64_image
   <<: *system_test_job
   needs:
     - job: gcc:softhsm2.6
       artifacts: true
 
 unit:gcc:softhsm2.6:
-  <<: *fedora_31_amd64_image
+  <<: *fedora_32_amd64_image
   <<: *unit_test_job
   needs:
     - job: gcc:softhsm2.6
       artifacts: true
 
-# Jobs for Clang builds on FreeBSD 11.3 (amd64)
+# Jobs for Clang builds on FreeBSD 11.4 (amd64)
 
-clang:freebsd11.3:amd64:
+clang:freebsd11.4:amd64:
   variables:
     CFLAGS: "${CFLAGS_COMMON}"
     USER: gitlab-runner
+    # Temporarily disable LMDB support [GL #1976]
+    EXTRA_CONFIGURE: "--without-lmdb"
   <<: *freebsd_amd64
   <<: *build_job
 
-system:clang:freebsd11.3:amd64:
+system:clang:freebsd11.4:amd64:
   <<: *freebsd_amd64
   <<: *system_test_job
   variables:
     USER: gitlab-runner
     TEST_PARALLEL_JOBS: 4
   needs:
-    - job: clang:freebsd11.3:amd64
+    - job: clang:freebsd11.4:amd64
       artifacts: true
 
-unit:clang:freebsd11.3:amd64:
+unit:clang:freebsd11.4:amd64:
   <<: *freebsd_amd64
   <<: *unit_test_job
   needs:
-    - job: clang:freebsd11.3:amd64
+    - job: clang:freebsd11.4:amd64
       artifacts: true
 
 # Jobs for Clang builds on FreeBSD 12.1 (amd64)
@@ -1125,7 +1127,8 @@ unit:clang:freebsd11.3:amd64:
 clang:freebsd12.1:amd64:
   variables:
     CFLAGS: "${CFLAGS_COMMON}"
-    EXTRA_CONFIGURE: "--enable-dnstap"
+    # Temporarily disable LMDB support [GL #1976]
+    EXTRA_CONFIGURE: "--enable-dnstap --without-lmdb"
     USER: gitlab-runner
   <<: *freebsd_amd64
   <<: *build_job
@@ -1147,22 +1150,22 @@ unit:clang:freebsd12.1:amd64:
     - job: clang:freebsd12.1:amd64
       artifacts: true
 
-# Jobs for Clang builds on OpenBSD 6.6 (amd64)
+# Jobs for Clang builds on OpenBSD 6.7 (amd64)
 
-clang:openbsd6.6:amd64:
+clang:openbsd6.7:amd64:
   variables:
     CC: clang
     USER: gitlab-runner
   <<: *openbsd_amd64
   <<: *build_job
 
-system:clang:openbsd6.6:amd64:
+system:clang:openbsd6.7:amd64:
   <<: *openbsd_amd64
   <<: *system_test_job
   variables:
     USER: gitlab-runner
   needs:
-    - job: clang:openbsd6.6:amd64
+    - job: clang:openbsd6.7:amd64
       artifacts: true
   only:
     - schedules
diff --git a/PLATFORMS.md b/PLATFORMS.md
index 66d0474718..f6fefda1fe 100644
--- a/PLATFORMS.md
+++ b/PLATFORMS.md
@@ -42,16 +42,16 @@ offer support on a "best effort" basis for some.
 
 ### Regularly tested platforms
 
-As of Mar 2020, BIND 9.17 is fully supported and regularly tested on the
+As of Jul 2020, BIND 9.17 is fully supported and regularly tested on the
 following systems:
 
 * Debian 9, 10
-* Ubuntu LTS 16.04, 18.04
-* Fedora 31
+* Ubuntu LTS 16.04, 20.04
+* Fedora 32
 * Red Hat Enterprise Linux / CentOS 7, 8
-* FreeBSD 11.3, 12.1
-* OpenBSD 6.6
-* Alpine Linux
+* FreeBSD 11.4, 12.1
+* OpenBSD 6.7
+* Alpine Linux 3.12
 
 The amd64, i386, armhf and arm64 CPU architectures are all fully supported.