diff --git a/.github/workflows/packages.yml b/.github/workflows/packages.yml
index 69f514f8..9eba6cfe 100644
--- a/.github/workflows/packages.yml
+++ b/.github/workflows/packages.yml
@@ -5,7 +5,7 @@ on:
 
 env:
   PIP_BREAK_SYSTEM_PACKAGES: "1"
-  LIBPQ_VERSION: "16.0"
+  LIBPQ_VERSION: "17.6"
   OPENSSL_VERSION: "1.1.1w"
 
 jobs:
diff --git a/scripts/build/build_libpq.sh b/scripts/build/build_libpq.sh
index 64d6f67b..c67dbb7d 100755
--- a/scripts/build/build_libpq.sh
+++ b/scripts/build/build_libpq.sh
@@ -56,12 +56,13 @@ fi
 case "$ID" in
     centos)
         yum update -y
-        yum install -y zlib-devel krb5-devel pam-devel
+        yum install -y flex krb5-devel pam-devel zlib-devel
         ;;
 
     alpine)
         apk upgrade
-        apk add --no-cache zlib-dev krb5-dev linux-pam-dev openldap-dev openssl-dev
+        apk add --no-cache flex krb5-dev linux-pam-dev openldap-dev \
+            openssl-dev zlib-dev
         ;;
 
     macos)