diff --git a/README.md b/README.md
index 24a32be..b7232a0 100644
--- a/README.md
+++ b/README.md
@@ -298,8 +298,9 @@ Here's the list of all the supported environment variables:
 
 | Extension | Environment variable | Description |
 |---|---|---|
+| | `IPE_FIX_CACERTS=1` | Old Alpine Linux (3.7 and 3.8) and Debian (Jessie and Stretch) versions don't work anymore with websites whose HTTPS certificate has been signed by Let's Encrypt ([more details here](https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/).<br /> By setting this environment variable, `install-php-extensions` will fix this issue |
 | | `IPE_KEEP_SYSPKG_CACHE=1` | By default the script will clear the apt/apk/pear cache in order to save disk space. You can disable it by setting this environment variable |
-| lzf | `IPE_LZF_BETTERCOMPRESSION=1` | By default `install-php-extensions` compiles the `lzf` extension to prefer speed over size; you can use this environment variable to compile it preferring size over speed  |
+| lzf | `IPE_LZF_BETTERCOMPRESSION=1` | By default `install-php-extensions` compiles the `lzf` extension to prefer speed over size; you can use this environment variable to compile it preferring size over speed |
 | event | `IPE_EVENT_NAMESPACE=`... | By default the `event` classes are defined in the root namespace. You can use this environment variable to specify a custom namespace |
 | gd | IPE_GD_WITHOUTAVIF=1 | Since PHP 8.1, gd supports the AVIF format. Enabling it requires compiling libaom/libdav1d/libyuv/libavif, which is time-consuming. You can disable AVIF support by setting this environment variable |
 
diff --git a/install-php-extensions b/install-php-extensions
index 36f1e89..b2337f9 100755
--- a/install-php-extensions
+++ b/install-php-extensions
@@ -2991,6 +2991,48 @@ removeStringFromList() {
 	printf '%s' "$removeStringFromList_result"
 }
 
+# Replace the list of trusted CA with toe ones provided by cURL.
+# (controlled by IPE_FIX_CACERTS is set)
+fixCACerts() {
+	case "${IPE_FIX_CACERTS:-}" in
+		1 | y* | Y*) ;;
+		*)
+			return
+			;;
+	esac
+	case "$DISTRO_VERSION" in
+		alpine@3.7 | alpine@3.8) ;;
+		debian@8 | debian@9)
+			if ! grep -q 'mozilla/ISRG_Root_X1.crt' /etc/ca-certificates.conf && grep -q 'mozilla/DST_Root_CA_X3.crt' /etc/ca-certificates.conf; then
+				fixCACerts_mustUpdate=1
+				if test -d /var/lib/apt/lists; then
+					for fixCACerts_item in $(ls -1 /var/lib/apt/lists); do
+						case "$fixCACerts_item" in
+							partial | lock) ;;
+							*)
+								fixCACerts_mustUpdate=0
+								break
+								;;
+						esac
+					done
+				fi
+				if test $fixCACerts_mustUpdate -eq 1; then
+					DEBIAN_FRONTEND=noninteractive apt-get update -q
+				fi
+				apt-get install -qqy --no-install-recommends ca-certificates
+			fi
+			;;
+		*)
+			# No needs to update the CA list
+			return
+			;;
+	esac
+	if grep -Eq '^mozilla/ISRG_Root_X1\.crt$' /etc/ca-certificates.conf && grep -Eq '^mozilla/DST_Root_CA_X3\.crt$' /etc/ca-certificates.conf; then
+		sed -i '/^mozilla\/DST_Root_CA_X3/s/^/!/' /etc/ca-certificates.conf
+		update-ca-certificates -f
+	fi
+}
+
 # Cleanup everything at the end of the execution
 cleanup() {
 	if test -n "$UNNEEDED_PACKAGE_LINKS"; then
@@ -3068,6 +3110,8 @@ if test -z "$PHP_MODULES_TO_INSTALL"; then
 	exit 0
 fi
 
+fixCACerts
+
 sortModulesToInstall
 
 docker-php-source extract
diff --git a/scripts/ci-test-extensions b/scripts/ci-test-extensions
index ab63c78..f26fdaa 100755
--- a/scripts/ci-test-extensions
+++ b/scripts/ci-test-extensions
@@ -317,7 +317,7 @@ testExtensionFor() {
 	printf ' - Docker image: %s\n' "$testExtensionFor_Image"
 	testExtensionFor_out="$(mktemp)"
 	testExtensionFor_start=$(date +%s)
-	if $(docker run --rm --volume "$CI_BUILD_DIR:/app" --env CI=true --workdir /app "$testExtensionFor_Image" sh -c "./install-php-extensions $1 && php ./scripts/check-installed-extension.php $1" >"$testExtensionFor_out" 2>&1); then
+	if $(docker run --rm --volume "$CI_BUILD_DIR:/app" --env CI=true --env IPE_FIX_CACERTS=1 --workdir /app "$testExtensionFor_Image" sh -c "./install-php-extensions $1 && php ./scripts/check-installed-extension.php $1" >"$testExtensionFor_out" 2>&1); then
 		testExtensionFor_end=$(date +%s)
 		testExtensionFor_delta=$(expr $testExtensionFor_end - $testExtensionFor_start)
 		rm -rf "$testExtensionFor_out"