diff --git a/Dockerfile b/Dockerfile
index a3ee2e0..d5e0ab2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,11 +16,12 @@ ARG VERSION=1.8.0 \
     VIM_VERSION=8.2
 
 RUN apt-get update && apt-get install --yes --no-install-recommends \
-  build-essential file libgmp-dev libmpc-dev libmpfr-dev m4 texinfo zip
+  build-essential curl file libgmp-dev libmpc-dev libmpfr-dev m4 texinfo zip
 
 # Download, verify, and unpack
 
-ADD https://ftp.gnu.org/gnu/binutils/binutils-$BINUTILS_VERSION.tar.xz \
+RUN curl --insecure --location --remote-name-all \
+    https://ftp.gnu.org/gnu/binutils/binutils-$BINUTILS_VERSION.tar.xz \
     https://ftp.gnu.org/gnu/gcc/gcc-$GCC_VERSION/gcc-$GCC_VERSION.tar.xz \
     https://ftp.gnu.org/gnu/gdb/gdb-$GDB_VERSION.tar.xz \
     https://ftp.gnu.org/gnu/gmp/gmp-$GMP_VERSION.tar.xz \
@@ -31,8 +32,7 @@ ADD https://ftp.gnu.org/gnu/binutils/binutils-$BINUTILS_VERSION.tar.xz \
     http://ftp.vim.org/pub/vim/unix/vim-$VIM_VERSION.tar.bz2 \
     https://www.nasm.us/pub/nasm/releasebuilds/$NASM_VERSION/nasm-$NASM_VERSION.tar.xz \
     http://deb.debian.org/debian/pool/main/u/universal-ctags/universal-ctags_0+git$CTAGS_VERSION.orig.tar.gz \
-    https://downloads.sourceforge.net/project/mingw-w64/mingw-w64/mingw-w64-release/mingw-w64-v$MINGW_VERSION.tar.bz2 \
-    /
+    https://downloads.sourceforge.net/project/mingw-w64/mingw-w64/mingw-w64-release/mingw-w64-v$MINGW_VERSION.tar.bz2
 COPY src/SHA256SUMS $PREFIX/src/
 RUN sha256sum -c $PREFIX/src/SHA256SUMS \
  && tar xJf binutils-$BINUTILS_VERSION.tar.xz \