diff --git a/build_tools/circle/build_doc.sh b/build_tools/circle/build_doc.sh
index 57486f1822ca5..f954ce5fd928c 100755
--- a/build_tools/circle/build_doc.sh
+++ b/build_tools/circle/build_doc.sh
@@ -130,7 +130,7 @@ conda create -n $CONDA_ENV_NAME --yes --quiet python="${PYTHON_VERSION:-*}" \
   cython="${CYTHON_VERSION:-*}" pytest coverage \
   matplotlib="${MATPLOTLIB_VERSION:-*}" sphinx=2.1.2 pillow \
   scikit-image="${SCIKIT_IMAGE_VERSION:-*}" pandas="${PANDAS_VERSION:-*}" \
-  joblib
+  joblib memory_profiler
 
 source activate testenv
 pip install sphinx-gallery==0.3.1
diff --git a/doc/conf.py b/doc/conf.py
index c68f22fff6218..0408c46ae4151 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -250,6 +250,7 @@
 sphinx_gallery_conf = {
     'doc_module': 'sklearn',
     'backreferences_dir': os.path.join('modules', 'generated'),
+    'show_memory': True,
     'reference_url': {
         'sklearn': None}
 }