diff --git a/src/php/bin/determine_extension_dir.sh b/src/php/bin/determine_extension_dir.sh
index b4342ac89fa8e562e4160e39dcad11eb9335ed43..a59882506f972a77601f70b1dcd8a05c499d8bee 100755
--- a/src/php/bin/determine_extension_dir.sh
+++ b/src/php/bin/determine_extension_dir.sh
@@ -29,11 +29,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 set -e
 default_extension_dir=$(php-config --extension-dir)
-if command -v brew > /dev/null && \
-   brew ls --versions | grep php5[56]-grpc > /dev/null; then
-  # the grpc php extension was installed by homebrew
-  :
-elif [ ! -e $default_extension_dir/grpc.so ]; then
+if [ ! -e $default_extension_dir/grpc.so ]; then
   # the grpc extension is not found in the default PHP extension dir
   # try the source modules directory
   module_dir=../ext/grpc/modules
diff --git a/templates/tools/dockerfile/php_deps.include b/templates/tools/dockerfile/php_deps.include
index 739049b5ea0c45727a3068f5d5fe1424f1c83bbe..da071e23ba4daff5320a1e4f7cc6aa8a7e39c556 100644
--- a/templates/tools/dockerfile/php_deps.include
+++ b/templates/tools/dockerfile/php_deps.include
@@ -3,11 +3,5 @@
 
 # Install dependencies
 
-RUN /bin/bash -l -c "echo 'deb http://packages.dotdeb.org wheezy-php55 all' ${'\\'}
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN /bin/bash -l -c "echo 'deb-src http://packages.dotdeb.org wheezy-php55 all' ${'\\'}
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN wget http://www.dotdeb.org/dotdeb.gpg -O- | apt-key add -
-
 RUN apt-get update && apt-get install -y ${'\\'}
     git php5 php5-dev phpunit unzip
diff --git a/tools/dockerfile/interoptest/grpc_interop_php/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_php/Dockerfile
index 65a8334269af391b4b35e3d9a14f2428210f0b3e..ef27af636144c506b70daf5acb08c34130494401 100644
--- a/tools/dockerfile/interoptest/grpc_interop_php/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_php/Dockerfile
@@ -98,12 +98,6 @@ RUN /bin/bash -l -c "gem install bundler --no-ri --no-rdoc"
 
 # Install dependencies
 
-RUN /bin/bash -l -c "echo 'deb http://packages.dotdeb.org wheezy-php55 all' \
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN /bin/bash -l -c "echo 'deb-src http://packages.dotdeb.org wheezy-php55 all' \
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN wget http://www.dotdeb.org/dotdeb.gpg -O- | apt-key add -
-
 RUN apt-get update && apt-get install -y \
     git php5 php5-dev phpunit unzip
 
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_php/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_php/Dockerfile
index bbbdd4a1518261fec39416f0fad9d9ead40c97c7..4adefe5d57b7e787b0ac3d0892ff4460a49a1398 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_php/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_php/Dockerfile
@@ -103,12 +103,6 @@ RUN pip install --upgrade google-api-python-client
 
 # Install dependencies
 
-RUN /bin/bash -l -c "echo 'deb http://packages.dotdeb.org wheezy-php55 all' \
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN /bin/bash -l -c "echo 'deb-src http://packages.dotdeb.org wheezy-php55 all' \
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN wget http://www.dotdeb.org/dotdeb.gpg -O- | apt-key add -
-
 RUN apt-get update && apt-get install -y \
     git php5 php5-dev phpunit unzip
 
diff --git a/tools/dockerfile/test/multilang_jessie_x64/Dockerfile b/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
index 92c8436851bb3046dbfae0ab1fcc38af3d780393..13f7c10f92f013d977233176547bc2c99a6331d1 100644
--- a/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
@@ -100,12 +100,6 @@ RUN /bin/bash -l -c "nvm alias default 4"
 
 # Install dependencies
 
-RUN /bin/bash -l -c "echo 'deb http://packages.dotdeb.org wheezy-php55 all' \
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN /bin/bash -l -c "echo 'deb-src http://packages.dotdeb.org wheezy-php55 all' \
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN wget http://www.dotdeb.org/dotdeb.gpg -O- | apt-key add -
-
 RUN apt-get update && apt-get install -y \
     git php5 php5-dev phpunit unzip
 
diff --git a/tools/dockerfile/test/php_jessie_x64/Dockerfile b/tools/dockerfile/test/php_jessie_x64/Dockerfile
index 2ef6e1d47fa74ad6df8a7b4abf348ec1f18d3fb1..17ea36b76c4983b2c41d1292f5788c1b2166f70e 100644
--- a/tools/dockerfile/test/php_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/php_jessie_x64/Dockerfile
@@ -83,12 +83,6 @@ RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
 
 # Install dependencies
 
-RUN /bin/bash -l -c "echo 'deb http://packages.dotdeb.org wheezy-php55 all' \
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN /bin/bash -l -c "echo 'deb-src http://packages.dotdeb.org wheezy-php55 all' \
-    >> /etc/apt/sources.list.d/dotdeb.list"
-RUN wget http://www.dotdeb.org/dotdeb.gpg -O- | apt-key add -
-
 RUN apt-get update && apt-get install -y \
     git php5 php5-dev phpunit unzip