diff --git a/plugins/python-build/bin/python-build b/plugins/python-build/bin/python-build
index 9558de5b..3d628e04 100755
--- a/plugins/python-build/bin/python-build
+++ b/plugins/python-build/bin/python-build
@@ -1626,7 +1626,7 @@ else
 fi
 
 if [ -z "$PYTHON_BUILD_MIRROR_URL" ]; then
-  PYTHON_BUILD_MIRROR_URL="http://yyuu.github.io/pythons"
+  PYTHON_BUILD_MIRROR_URL="https://yyuu.github.io/pythons"
 else
   PYTHON_BUILD_MIRROR_URL="${PYTHON_BUILD_MIRROR_URL%/}"
 fi
diff --git a/plugins/python-build/test/cache.bats b/plugins/python-build/test/cache.bats
index bc0984f3..6a302d00 100644
--- a/plugins/python-build/test/cache.bats
+++ b/plugins/python-build/test/cache.bats
@@ -59,7 +59,7 @@ setup() {
 
   stub shasum true "echo invalid" "echo $checksum"
   stub curl "-*I* : true" \
-    "-q -o * -*S* http://?*/$checksum : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$3"
+    "-q -o * -*S* https://?*/$checksum : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$3"
 
   touch "${PYTHON_BUILD_CACHE_PATH}/package-1.0.0.tar.gz"
 
diff --git a/plugins/python-build/test/mirror.bats b/plugins/python-build/test/mirror.bats
index 7f681361..0ae58abe 100644
--- a/plugins/python-build/test/mirror.bats
+++ b/plugins/python-build/test/mirror.bats
@@ -92,7 +92,7 @@ export PYTHON_BUILD_MIRROR_URL=http://mirror.example.com
 
   stub shasum true "echo $checksum"
   stub curl "-*I* : true" \
-    "-q -o * -*S* http://?*/$checksum : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$3" \
+    "-q -o * -*S* https://?*/$checksum : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$3" \
 
   install_fixture definitions/with-checksum
   [ "$status" -eq 0 ]