diff --git a/docker/1.4.12/Dockerfile b/docker/1.4.12/Dockerfile
index a8ab47d0..fb662061 100644
--- a/docker/1.4.12/Dockerfile
+++ b/docker/1.4.12/Dockerfile
@@ -3,7 +3,7 @@ MAINTAINER David Audet <david.audet@ca.com>
 
 LABEL Description="Eclipse Mosquitto MQTT Broker"
 
-RUN apk --no-cache add mosquitto=1.4.12-r0 && \
+RUN apk --no-cache add mosquitto=1.4.12-r0 ca-certificates && \
     mkdir -p /mosquitto/config /mosquitto/data /mosquitto/log && \
     cp /etc/mosquitto/mosquitto.conf /mosquitto/config && \
     chown -R mosquitto:mosquitto /mosquitto
diff --git a/docker/1.5/Dockerfile b/docker/1.5/Dockerfile
index 6e224636..28d4fe41 100644
--- a/docker/1.5/Dockerfile
+++ b/docker/1.5/Dockerfile
@@ -14,7 +14,8 @@ RUN set -x && \
         cmake \
         gnupg \
         libressl-dev \
-        util-linux-dev && \
+        util-linux-dev \
+        ca-certificates && \
     wget https://github.com/warmcat/libwebsockets/archive/v${LWS_VERSION}.tar.gz -O /tmp/lws.tar.gz && \
     mkdir -p /build/lws && \
     tar --strip=1 -xf /tmp/lws.tar.gz -C /build/lws && \
diff --git a/docker/1.6/Dockerfile b/docker/1.6/Dockerfile
index 72c6b377..b1f63b10 100644
--- a/docker/1.6/Dockerfile
+++ b/docker/1.6/Dockerfile
@@ -14,7 +14,8 @@ RUN set -x && \
         cmake \
         gnupg \
         libressl-dev \
-        util-linux-dev && \
+        util-linux-dev \
+        ca-certificates && \
     wget https://github.com/warmcat/libwebsockets/archive/v${LWS_VERSION}.tar.gz -O /tmp/lws.tar.gz && \
     mkdir -p /build/lws && \
     tar --strip=1 -xf /tmp/lws.tar.gz -C /build/lws && \
diff --git a/docker/generic/Dockerfile b/docker/generic/Dockerfile
index 01f8d266..6343af49 100644
--- a/docker/generic/Dockerfile
+++ b/docker/generic/Dockerfile
@@ -12,7 +12,8 @@ RUN apk --no-cache add \
       util-linux-dev \
       libwebsockets-dev \
       libxslt \
-      python2
+      python2 \
+      ca-certificates
 
 # This build procedure is based on:
 # https://github.com/alpinelinux/aports/blob/master/main/mosquitto/APKBUILD
diff --git a/docker/local/Dockerfile b/docker/local/Dockerfile
index 1d7517ab..5e699ad4 100644
--- a/docker/local/Dockerfile
+++ b/docker/local/Dockerfile
@@ -13,7 +13,8 @@ RUN set -x && \
         cmake \
         gnupg \
         libressl-dev \
-        util-linux-dev && \
+        util-linux-dev \
+        ca-certificates && \
     wget https://github.com/warmcat/libwebsockets/archive/v${LWS_VERSION}.tar.gz -O /tmp/lws.tar.gz && \
     mkdir -p /build/lws && \
     tar --strip=1 -xf /tmp/lws.tar.gz -C /build/lws && \