diff --git a/imagefiles/build-and-install-curl.sh b/imagefiles/build-and-install-curl.sh
index bb347ad..54f14f9 100755
--- a/imagefiles/build-and-install-curl.sh
+++ b/imagefiles/build-and-install-curl.sh
@@ -29,7 +29,13 @@ function build_curl {
     local curl_sha256=$2
     check_var ${curl_sha256}
     check_var ${CURL_DOWNLOAD_URL}
-    curl -fsSLO ${CURL_DOWNLOAD_URL}/${curl_fname}.tar.gz
+    curl --connect-timeout 30 \
+        --max-time 10 \
+        --retry 5 \
+        --retry-delay 10 \
+        --retry-max-time 30 \
+        -fsSLO ${CURL_DOWNLOAD_URL}/${curl_fname}.tar.gz
+
     check_sha256sum ${curl_fname}.tar.gz ${curl_sha256}
     tar -zxf ${curl_fname}.tar.gz
     (cd curl-*/ && do_curl_build)
diff --git a/imagefiles/build-and-install-git.sh b/imagefiles/build-and-install-git.sh
index 9d1f249..b6237ef 100755
--- a/imagefiles/build-and-install-git.sh
+++ b/imagefiles/build-and-install-git.sh
@@ -25,7 +25,12 @@ cd /usr/src
 
 url="https://mirrors.edge.kernel.org/pub/software/scm/git/git-${GIT_VERSION}.tar.gz"
 echo "Downloading $url"
-curl -# -LO $url
+curl --connect-timeout 20 \
+    --max-time 10 \
+    --retry 5 \
+    --retry-delay 10 \
+    --retry-max-time 40 \
+    -# -LO $url
 
 tar xvzf git-${GIT_VERSION}.tar.gz  --no-same-owner
 rm -f git-${GIT_VERSION}.tar.gz
diff --git a/imagefiles/build-and-install-ninja.sh b/imagefiles/build-and-install-ninja.sh
index a2789dc..be337e3 100755
--- a/imagefiles/build-and-install-ninja.sh
+++ b/imagefiles/build-and-install-ninja.sh
@@ -27,7 +27,13 @@ done
 
 # Download
 REV=v1.10.2
-curl -# -o ninja.tar.gz -LO https://github.com/ninja-build/ninja/archive/$REV.tar.gz
+curl --connect-timeout 30 \
+    --max-time 10 \
+    --retry 5 \
+    --retry-delay 10 \
+    --retry-max-time 30 \
+    -# -o ninja.tar.gz -LO https://github.com/ninja-build/ninja/archive/$REV.tar.gz
+
 mkdir ninja
 tar -xzvf ./ninja.tar.gz --strip-components=1 -C ./ninja
 
diff --git a/imagefiles/build-and-install-openssh.sh b/imagefiles/build-and-install-openssh.sh
index a8b1d9a..4e1a4fa 100755
--- a/imagefiles/build-and-install-openssh.sh
+++ b/imagefiles/build-and-install-openssh.sh
@@ -5,7 +5,13 @@ set -ex
 OPENSSH_ROOT=V_8_5_P1
 
 cd /usr/src
-curl -LO https://github.com/openssh/openssh-portable/archive/${OPENSSH_ROOT}.tar.gz
+curl --connect-timeout 20 \
+    --max-time 10 \
+    --retry 5 \
+    --retry-delay 10 \
+    --retry-max-time 40 \
+    -LO https://github.com/openssh/openssh-portable/archive/${OPENSSH_ROOT}.tar.gz
+
 tar -xvf ${OPENSSH_ROOT}.tar.gz
 rm -f ${OPENSSH_ROOT}.tar.gz
 
diff --git a/imagefiles/build-and-install-openssl.sh b/imagefiles/build-and-install-openssl.sh
index 19a6610..cc5f7b8 100755
--- a/imagefiles/build-and-install-openssl.sh
+++ b/imagefiles/build-and-install-openssl.sh
@@ -69,7 +69,13 @@ function build_perl {
     local perl_sha256=$2
     check_var ${perl_sha256}
     check_var ${PERL_DOWNLOAD_URL}
-    curl -fsSLO ${PERL_DOWNLOAD_URL}/${perl_fname}.tar.gz
+    curl --connect-timeout 30 \
+        --max-time 10 \
+        --retry 5 \
+        --retry-delay 10 \
+        --retry-max-time 30 \
+        -fsSLO ${PERL_DOWNLOAD_URL}/${perl_fname}.tar.gz
+
     check_sha256sum ${perl_fname}.tar.gz ${perl_sha256}
     tar -xzf ${perl_fname}.tar.gz
     (cd ${perl_fname} && do_perl_build)
@@ -88,7 +94,13 @@ function build_openssl {
     local openssl_sha256=$2
     check_var ${openssl_sha256}
     check_var ${OPENSSL_DOWNLOAD_URL}
-    curl -fsSLO ${OPENSSL_DOWNLOAD_URL}/${openssl_fname}.tar.gz
+    curl --connect-timeout 30 \
+        --max-time 10 \
+        --retry 5 \
+        --retry-delay 10 \
+        --retry-max-time 30 \
+        -fsSLO ${OPENSSL_DOWNLOAD_URL}/${openssl_fname}.tar.gz
+
     check_sha256sum ${openssl_fname}.tar.gz ${openssl_sha256}
     tar -xzf ${openssl_fname}.tar.gz
     (cd ${openssl_fname} && PATH=/opt/perl/bin:${PATH} do_openssl_build)
diff --git a/imagefiles/install-cmake-binary.sh b/imagefiles/install-cmake-binary.sh
index 9c34087..2e9fb92 100755
--- a/imagefiles/install-cmake-binary.sh
+++ b/imagefiles/install-cmake-binary.sh
@@ -38,7 +38,12 @@ cd /usr/src
 CMAKE_ROOT=cmake-${CMAKE_VERSION}-Centos5-${ARCH}
 url=https://github.com/dockbuild/CMake/releases/download/v${CMAKE_VERSION}/${CMAKE_ROOT}.tar.gz
 echo "Downloading $url"
-curl -# -LO $url
+curl --connect-timeout 30 \
+    --max-time 10 \
+    --retry 5 \
+    --retry-delay 10 \
+    --retry-max-time 30 \
+    -# -LO $url
 
 tar -xzvf ${CMAKE_ROOT}.tar.gz
 rm -f ${CMAKE_ROOT}.tar.gz
diff --git a/imagefiles/install-gosu-binary.sh b/imagefiles/install-gosu-binary.sh
index 2668036..2eb082e 100755
--- a/imagefiles/install-gosu-binary.sh
+++ b/imagefiles/install-gosu-binary.sh
@@ -26,10 +26,20 @@ gpg --keyserver hkp://pgp.key-server.io:80 --recv-keys B42F6819007F00F88E364FD40
 gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4
 
 echo "Downloading $url"
-curl -o /usr/local/bin/gosu -# -SL $url
+curl --connect-timeout 30 \
+    --max-time 10 \
+    --retry 5 \
+    --retry-delay 10 \
+    --retry-max-time 30 \
+    -o /usr/local/bin/gosu -# -SL $url
 
 echo "Downloading $url_key"
-curl -o /usr/local/bin/gosu.asc -# -SL $url_key
+curl --connect-timeout 30 \
+    --max-time 10 \
+    --retry 5 \
+    --retry-delay 10 \
+    --retry-max-time 30 \
+    -o /usr/local/bin/gosu.asc -# -SL $url_key
 
 gpg --verify /usr/local/bin/gosu.asc