diff --git a/appveyor/install.ps1 b/appveyor/install.ps1
index d7a830c2..9959dc3e 100644
--- a/appveyor/install.ps1
+++ b/appveyor/install.ps1
@@ -166,21 +166,21 @@ CheckAndInstallMsiFromUrl `
     -driver_name "ODBC Driver 13 for SQL Server" `
     -driver_bitness "64-bit" `
     -driver_url "https://download.microsoft.com/download/D/5/E/D5EEF288-A277-45C8-855B-8E2CB7E25B96/x64/msodbcsql.msi" `
-    -msifile_path "$cache_dir\msodbcsql_13.1.0.0_x64.msi" `
+    -msifile_path "$cache_dir\msodbcsql_13_E25B96_x64.msi" `
     -msiexec_paras @("IACCEPTMSODBCSQLLICENSETERMS=YES", "ADDLOCAL=ALL");
 
 CheckAndInstallMsiFromUrl `
     -driver_name "ODBC Driver 17 for SQL Server" `
     -driver_bitness "64-bit" `
-    -driver_url "https://download.microsoft.com/download/6/f/f/6ffefc73-39ab-4cc0-bb7c-4093d64c2669/en-US/17.10.4.1/x64/msodbcsql.msi" `
-    -msifile_path "$cache_dir\msodbcsql_17.10.4.1_x64.msi" `
+    -driver_url "https://download.microsoft.com/download/6/f/f/6ffefc73-39ab-4cc0-bb7c-4093d64c2669/en-US/17.10.6.1/x64/msodbcsql.msi" `
+    -msifile_path "$cache_dir\msodbcsql_17.10.6.1_x64.msi" `
     -msiexec_paras @("IACCEPTMSODBCSQLLICENSETERMS=YES", "ADDLOCAL=ALL");
 
 CheckAndInstallMsiFromUrl `
     -driver_name "ODBC Driver 18 for SQL Server" `
     -driver_bitness "64-bit" `
-    -driver_url "https://download.microsoft.com/download/4/f/e/4fed6f4b-dc42-4255-b4b4-70f8e2a35a63/en-US/18.3.1.1/x64/msodbcsql.msi" `
-    -msifile_path "$cache_dir\msodbcsql_18.3.1.1_x64.msi" `
+    -driver_url "https://download.microsoft.com/download/1/7/4/17423b83-b75d-42e1-b5b9-eaa266561c5e/Windows/amd64/1033/msodbcsql.msi" `
+    -msifile_path "$cache_dir\msodbcsql_18_561c5e_x64.msi" `
     -msiexec_paras @("IACCEPTMSODBCSQLLICENSETERMS=YES", "ADDLOCAL=ALL");
 
 # some drivers must be installed in alignment with Python's bitness
@@ -189,23 +189,23 @@ if ($python_arch -eq "64") {
     CheckAndInstallZippedMsiFromUrl `
         -driver_name "PostgreSQL Unicode(x64)" `
         -driver_bitness "64-bit" `
-        -driver_url "https://ftp.postgresql.org/pub/odbc/versions/msi/psqlodbc_11_01_0000-x64.zip" `
+        -driver_url "https://ftp.postgresql.org/pub/odbc/versions.old/msi/psqlodbc_11_01_0000-x64.zip" `
         -zipfile_path "$temp_dir\psqlodbc_11_01_0000-x64.zip" `
         -zip_internal_msi_file "psqlodbc_x64.msi" `
         -msifile_path "$cache_dir\psqlodbc_11_01_0000-x64.msi";
 
     CheckAndInstallMsiFromUrl `
-        -driver_name "MySQL ODBC 8.0 ANSI Driver" `
+        -driver_name "MySQL ODBC 8.4 ANSI Driver" `
         -driver_bitness "64-bit" `
-        -driver_url "https://dev.mysql.com/get/Downloads/Connector-ODBC/8.0/mysql-connector-odbc-8.0.33-winx64.msi" `
-        -msifile_path "$cache_dir\mysql-connector-odbc-8.0.33-winx64.msi";
+        -driver_url "https://downloads.mysql.com/archives/get/p/10/file/mysql-connector-odbc-8.4.0-winx64.msi" `
+        -msifile_path "$cache_dir\mysql-connector-odbc-8.4.0-winx64.msi";
 
 } elseif ($python_arch -eq "32") {
 
     CheckAndInstallZippedMsiFromUrl `
         -driver_name "PostgreSQL Unicode" `
         -driver_bitness "32-bit" `
-        -driver_url "https://ftp.postgresql.org/pub/odbc/versions/msi/psqlodbc_11_01_0000-x86.zip" `
+        -driver_url "https://ftp.postgresql.org/pub/odbc/versions.old/msi/psqlodbc_11_01_0000-x86.zip" `
         -zipfile_path "$temp_dir\psqlodbc_11_01_0000-x86.zip" `
         -zip_internal_msi_file "psqlodbc_x86.msi" `
         -msifile_path "$cache_dir\psqlodbc_11_01_0000-x86.msi";
@@ -213,8 +213,8 @@ if ($python_arch -eq "64") {
     CheckAndInstallMsiFromUrl `
         -driver_name "MySQL ODBC 8.0 ANSI Driver" `
         -driver_bitness "32-bit" `
-        -driver_url "https://dev.mysql.com/get/Downloads/Connector-ODBC/8.0/mysql-connector-odbc-8.0.33-win32.msi" `
-        -msifile_path "$cache_dir\mysql-connector-odbc-8.0.33-win32.msi";
+        -driver_url "https://dev.mysql.com/get/Downloads/Connector-ODBC/8.0/mysql-connector-odbc-8.0.37-win32.msi" `
+        -msifile_path "$cache_dir\mysql-connector-odbc-8.0.37-win32.msi";
 
 } else {
     Write-Output "ERROR: Unexpected Python architecture:"
diff --git a/appveyor/test_script.cmd b/appveyor/test_script.cmd
index 106b6039..0fe6405c 100644
--- a/appveyor/test_script.cmd
+++ b/appveyor/test_script.cmd
@@ -194,7 +194,11 @@ ECHO *** Get MySQL version
 "%MYSQL_PATH%\bin\mysql" -u root -pPassword12! -e "STATUS"
 
 :mysql1
-SET DRIVER={MySQL ODBC 8.0 ANSI Driver}
+IF %PYTHON_ARCH% EQU 32 (
+  SET DRIVER={MySQL ODBC 8.0 ANSI Driver}
+) ELSE (
+  SET DRIVER={MySQL ODBC 8.4 ANSI Driver}
+)
 SET PYODBC_MYSQL=Driver=%DRIVER%;Charset=utf8mb4;Server=localhost;Port=3306;Database=mysql;Uid=root;Pwd=Password12!;
 ECHO.
 ECHO *** Run tests using driver: "%DRIVER%"