diff --git a/CMakeLists.txt b/CMakeLists.txt
index cc82692328..42c9068e08 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -298,7 +298,7 @@ else()
         message(FATAL_ERROR "Can not find BLAS or LAPACK!  These are required for Armadillo.  Please install one of them---or install Armadillo---before installing mlpack.")
       endif()
     endif()
-    get_deps(http://files.mlpack.org/armadillo-10.3.0.tar.gz armadillo armadillo-10.3.0.tar.gz)
+    get_deps(https://files.mlpack.org/armadillo-10.3.0.tar.gz armadillo armadillo-10.3.0.tar.gz)
     set(ARMADILLO_INCLUDE_DIR ${GENERIC_INCLUDE_DIR})
     find_package(Armadillo REQUIRED)
   endif()
@@ -313,7 +313,7 @@ if (NOT DOWNLOAD_DEPENDENCIES)
 else()
   find_package(StbImage)
   if (NOT STB_IMAGE_FOUND)
-    get_deps(http://mlpack.org/files/stb.tar.gz stb stb.tar.gz)
+    get_deps(https://mlpack.org/files/stb.tar.gz stb stb.tar.gz)
     set(STB_IMAGE_INCLUDE_DIR ${GENERIC_INCLUDE_DIR})
     find_package(StbImage REQUIRED)
   endif()
@@ -339,7 +339,7 @@ if (NOT DOWNLOAD_DEPENDENCIES)
 else()
   find_package(Ensmallen "${ENSMALLEN_VERSION}")
   if (NOT ENSMALLEN_FOUND)
-    get_deps(http://www.ensmallen.org/files/ensmallen-latest.tar.gz ensmallen ensmallen-latest.tar.gz)
+    get_deps(https://www.ensmallen.org/files/ensmallen-latest.tar.gz ensmallen ensmallen-latest.tar.gz)
     set(ENSMALLEN_INCLUDE_DIR ${GENERIC_INCLUDE_DIR})
     find_package(Ensmallen REQUIRED)
   endif()