diff --git a/1.15/Dockerfile b/1.15/Dockerfile
deleted file mode 100644
index 64b1698..0000000
--- a/1.15/Dockerfile
+++ /dev/null
@@ -1,11 +0,0 @@
-FROM buildpack-deps:jessie
-
-ENV RUST_VERSION=1.15.0
-ENV RUST_ARCHIVE=rust-${RUST_VERSION}-x86_64-unknown-linux-gnu
-
-RUN curl -sSLO https://static.rust-lang.org/dist/${RUST_ARCHIVE}.tar.gz \
-	&& tar -xzf ${RUST_ARCHIVE}.tar.gz \
-	&& ./${RUST_ARCHIVE}/install.sh --without=rust-docs \
-	&& rm -rf \
-		${RUST_ARCHIVE} \
-		${RUST_ARCHIVE}.tar.gz
diff --git a/1.14/Dockerfile b/Dockerfile
similarity index 92%
rename from 1.14/Dockerfile
rename to Dockerfile
index c74c89a..90b5be5 100644
--- a/1.14/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM buildpack-deps:jessie
 
-ENV RUST_VERSION=1.14.0
+ENV RUST_VERSION=1.18.0
 ENV RUST_ARCHIVE=rust-${RUST_VERSION}-x86_64-unknown-linux-gnu
 
 RUN curl -sSLO https://static.rust-lang.org/dist/${RUST_ARCHIVE}.tar.gz \