diff --git a/README.md b/README.md
index 145d1f9..51cbc22 100644
--- a/README.md
+++ b/README.md
@@ -77,9 +77,9 @@ others above, `CONFIG_DISABLE` prevents overwriting templated files.
     determines the order in which they are templated into the configuration file.
     The format is a space separated string like "http 127.0.0.1 3129"
  * `PROXYCHAIN_TYPE`
-    Default `strict-chain`. Can be `strict-chain` or `dynamic-chain` sensibly
-    within this image. In `strict-chain` mode, all proxies must be up. In
-    `dynamic-chain` mode proxies are used in order, but skipped if down.
+    Default `strict_chain`. Can be `strict_chain` or `dynamic_chain` sensibly
+    within this image. In `strict_chain` mode, all proxies must be up. In
+    `dynamic_chain` mode proxies are used in order, but skipped if down.
     Disable configuration and bind a configuration file to /etc/proxychains.conf
     if you need more flexibility.
   
diff --git a/docker-squid/squid.bsh b/docker-squid/squid.bsh
index ec3b09c..a21aeff 100755
--- a/docker-squid/squid.bsh
+++ b/docker-squid/squid.bsh
@@ -77,7 +77,7 @@ if [ "$PROXYCHAIN" = "yes" ] && [ "$CONFIG_DISABLE" != "yes" ]; then
     if [ ! -z "$PROXYCHAIN_TYPE" ]; then
         echo "$PROXYCHAIN_TYPE" >> /etc/proxychains.conf
     else
-        echo "strict-chain" >> /etc/proxychains.conf
+        echo "strict_chain" >> /etc/proxychains.conf
     fi
     echo "[ProxyList]" >> /etc/proxychains.conf
     env | grep 'PROXYCHAIN_PROXY' | sort | while read proxyline; do