diff --git a/build/Dockerfile b/build/Dockerfile
index 956632613c..dd9933af42 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx:1.17.2
+FROM nginx:1.17.3
 
 # forward nginx access and error logs to stdout and stderr of the ingress
 # controller process
diff --git a/build/DockerfileForAlpine b/build/DockerfileForAlpine
index a808445df9..6a9a905c13 100644
--- a/build/DockerfileForAlpine
+++ b/build/DockerfileForAlpine
@@ -1,4 +1,4 @@
-FROM nginx:1.17.2-alpine
+FROM nginx:1.17.3-alpine
 
 # forward nginx access and error logs to stdout and stderr of the ingress
 # controller process
diff --git a/build/DockerfileWithOpentracing b/build/DockerfileWithOpentracing
index 5f9339b1b9..f3e923e916 100644
--- a/build/DockerfileWithOpentracing
+++ b/build/DockerfileWithOpentracing
@@ -1,4 +1,4 @@
-ARG NGINX_VERSION=1.17.2
+ARG NGINX_VERSION=1.17.3
 ARG OPENTRACING_CPP_VERSION=1.5.1
 
 FROM nginx:${NGINX_VERSION} AS opentracing-builder