diff --git a/3.5/Dockerfile b/3.5/Dockerfile
index 214537104..85bf3bbf6 100644
--- a/3.5/Dockerfile
+++ b/3.5/Dockerfile
@@ -20,7 +20,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.5.2
+ENV PYTHON_VERSION 3.5.3
 
 # if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
 ENV PYTHON_PIP_VERSION 9.0.1
diff --git a/3.5/alpine/Dockerfile b/3.5/alpine/Dockerfile
index d71bbf9f2..a867fb86b 100644
--- a/3.5/alpine/Dockerfile
+++ b/3.5/alpine/Dockerfile
@@ -18,7 +18,7 @@ ENV LANG C.UTF-8
 RUN apk add --no-cache ca-certificates
 
 ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.5.2
+ENV PYTHON_VERSION 3.5.3
 
 # if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
 ENV PYTHON_PIP_VERSION 9.0.1
diff --git a/3.5/slim/Dockerfile b/3.5/slim/Dockerfile
index 328bd9f53..422f81a11 100644
--- a/3.5/slim/Dockerfile
+++ b/3.5/slim/Dockerfile
@@ -22,7 +22,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.5.2
+ENV PYTHON_VERSION 3.5.3
 
 # if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
 ENV PYTHON_PIP_VERSION 9.0.1
diff --git a/3.5/windows/windowsservercore/Dockerfile b/3.5/windows/windowsservercore/Dockerfile
index b218d0f3b..b15fbeda4 100644
--- a/3.5/windows/windowsservercore/Dockerfile
+++ b/3.5/windows/windowsservercore/Dockerfile
@@ -8,8 +8,8 @@ FROM microsoft/windowsservercore
 
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]
 
-ENV PYTHON_VERSION 3.5.2
-ENV PYTHON_RELEASE 3.5.2
+ENV PYTHON_VERSION 3.5.3
+ENV PYTHON_RELEASE 3.5.3
 
 # if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
 ENV PYTHON_PIP_VERSION 9.0.1