diff --git a/.github/run_integration_tests.sh b/.github/run_integration_tests.sh
index 2f9532f6..184a04f6 100644
--- a/.github/run_integration_tests.sh
+++ b/.github/run_integration_tests.sh
@@ -2,7 +2,7 @@
 
 set -exo pipefail
 
-if [ $DB == 'postgres' ]
+if [ "$DB" == "postgres" ]
 then
   sudo apt-get install postgresql-client -y
 fi
diff --git a/.github/setup_mysql.sh b/.github/setup_mysql.sh
index 81825528..2f7ffd44 100644
--- a/.github/setup_mysql.sh
+++ b/.github/setup_mysql.sh
@@ -2,7 +2,7 @@
 
 set -exo pipefail
 
-MYSQL="mysql:8.0"
+MYSQL="mysql:8.0.30"
 tries=0
 
 sudo service mysql stop
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e37d762..e6ec17d8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -96,22 +96,22 @@ jobs:
             DB: mysql
           - crystal_version: 1.10.1
             DB: postgres
-          - crystal_version: 1.11.1
+          - crystal_version: 1.11.2
             DB: mysql
             integration: true
             linter: true
-          - crystal_version: 1.11.1
+          - crystal_version: 1.11.2
             DB: postgres
             integration: true
             linter: true
-          - crystal_version: 1.11.1
+          - crystal_version: 1.11.2
             DB: postgres
             other: MT=1
-          - crystal_version: 1.11.1
+          - crystal_version: 1.11.2
             DB: postgres
             pair: true
             other: PAIR_DB_USER=root PAIR_DB_PASSWORD=
-          - crystal_version: 1.11.1
+          - crystal_version: 1.11.2
             DB: mysql
             pair: true
             other: PAIR_DB_USER=dbuser PAIR_DB_PASSWORD=dbpassword
@@ -164,7 +164,7 @@ jobs:
 
       - name: Run specs
         run: |
-          if [ $MT == '1' ]
+          if [ "$MT" = "1" ]
           then
             crystal spec -Dpreview_mt
           else