diff --git a/5.6/Dockerfile b/5.6/Dockerfile
index 55d79f5..e94c1d6 100644
--- a/5.6/Dockerfile
+++ b/5.6/Dockerfile
@@ -31,9 +31,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       soap \
       xsl \
       zip \
-      sockets \
-      pdo_sqlsrv \
-      sqlsrv
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/5.6/apache/Dockerfile b/5.6/apache/Dockerfile
index eb77cb1..34ea961 100644
--- a/5.6/apache/Dockerfile
+++ b/5.6/apache/Dockerfile
@@ -32,8 +32,6 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       xsl \
       zip \
       sockets \
-      pdo_sqlsrv \
-      sqlsrv \
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/5.6/fpm/Dockerfile b/5.6/fpm/Dockerfile
index 4316ad2..c0b7773 100644
--- a/5.6/fpm/Dockerfile
+++ b/5.6/fpm/Dockerfile
@@ -31,9 +31,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       soap \
       xsl \
       zip \
-      sockets \
-      pdo_sqlsrv \
-      sqlsrv
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/Makefile b/Makefile
index 3378dfa..4142187 100644
--- a/Makefile
+++ b/Makefile
@@ -28,9 +28,7 @@ EXTENSIONS := \
 	soap \
 	xsl \
 	zip \
-    sockets \
-    pdo_sqlsrv \
-    sqlsrv
+	sockets
 ifeq (,$(findstring $(PHP_VERSION), 7.2 7.3 7.4 latest))
 	# Add more extensions to PHP < 7.2.
 	EXTENSIONS += mcrypt
@@ -38,6 +36,9 @@ endif
 ifeq (,$(findstring $(PHP_VERSION), 7.0 7.1 7.2 7.3 7.4 latest))
 	# Add more extensions to 5.x series images.
 	EXTENSIONS += mysql
+else
+	EXTENSIONS += pdo_sqlsrv \
+	   	sqlsrv
 endif
 
 build:
diff --git a/README.md b/README.md
index 4f33df1..69025f8 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@ in addition to those you can already find in the [official PHP image](https://hu
 - `mysqli`
 - `pdo_mysql`
 - `pdo_pgsql`
-- `pdo_sqlsrv`
+- `pdo_sqlsrv` (_only PHP ≥ 7.0_)
 - `pgsql`
 - `redis`
 - `soap`
@@ -80,7 +80,7 @@ in addition to those you can already find in the [official PHP image](https://hu
 - `Zend OPcache`
 - `zip`
 - `sockets`
-- `sqlsrv`
+- `sqlsrv` (_only PHP ≥ 7.0_)
 
 You will probably not need all this stuff. Even if having some extra extensions loaded ain't a big issue in most cases, you will very likely want to checkout this repository, remove unwanted extensions from the `Dockerfile`, and build your own image — for sometimes removing is easier than adding. 😉
 
diff --git a/dev/Makefile b/dev/Makefile
index 3def982..d58e039 100644
--- a/dev/Makefile
+++ b/dev/Makefile
@@ -29,9 +29,7 @@ EXTENSIONS := \
 	Xdebug \
 	xsl \
 	zip \
-    sockets \
-    pdo_sqlsrv \
-    sqlsrv
+    sockets
 ifeq (,$(findstring $(PHP_VERSION), 7.2 7.3 7.4 latest))
 	# Add more extensions to PHP < 7.2.
 	EXTENSIONS += mcrypt
@@ -39,6 +37,9 @@ endif
 ifeq (,$(findstring $(PHP_VERSION), 7.0 7.1 7.2 7.3 7.4 latest))
 	# Add more extensions to 5.x series images.
 	EXTENSIONS += mysql
+else
+	EXTENSIONS += pdo_sqlsrv \
+	   	sqlsrv
 endif
 
 build: