diff --git a/src/scripts/darwin.sh b/src/scripts/darwin.sh
index 83d3267c..585fff13 100644
--- a/src/scripts/darwin.sh
+++ b/src/scripts/darwin.sh
@@ -46,9 +46,9 @@ get_pecl_version() {
   stability="$(echo "$2" | grep -m 1 -Eio "(alpha|beta|rc|snapshot|preview)")"
   pecl_rest='https://pecl.php.net/rest/r/'
   response=$(curl "${curl_opts[@]}" "$pecl_rest$extension"/allreleases.xml)
-  pecl_version=$(echo "$response" | grep -m 1 -Eio "(\d*\.\d*\.\d*$stability\d*)")
+  pecl_version=$(echo "$response" | grep -m 1 -Eio "([0-9]+\.[0-9]+\.[0-9]+${stability}[0-9]+)")
   if [ ! "$pecl_version" ]; then
-    pecl_version=$(echo "$response" | grep -m 1 -Eo "(\d*\.\d*\.\d*)")
+    pecl_version=$(echo "$response" | grep -m 1 -Eo "([0-9]+\.[0-9]+\.[0-9]+)")
   fi
   echo "$pecl_version"
 }
diff --git a/src/scripts/linux.sh b/src/scripts/linux.sh
index 7cb6ca83..395f913f 100644
--- a/src/scripts/linux.sh
+++ b/src/scripts/linux.sh
@@ -52,9 +52,9 @@ get_pecl_version() {
   stability="$(echo "$2" | grep -m 1 -Eio "(alpha|beta|rc|snapshot|preview)")"
   pecl_rest='https://pecl.php.net/rest/r/'
   response=$(curl "${curl_opts[@]}" "$pecl_rest$extension"/allreleases.xml)
-  pecl_version=$(echo "$response" | grep -m 1 -Pio "(\d*\.\d*\.\d*$stability\d*)")
+  pecl_version=$(echo "$response" | grep -m 1 -Eio "([0-9]+\.[0-9]+\.[0-9]+${stability}[0-9]+)")
   if [ ! "$pecl_version" ]; then
-    pecl_version=$(echo "$response" | grep -m 1 -Po "(\d*\.\d*\.\d*)")
+    pecl_version=$(echo "$response" | grep -m 1 -Eo "([0-9]+\.[0-9]+\.[0-9]+)")
   fi
   echo "$pecl_version"
 }