From f329886e85213ae1562190cf7358ee645b888e9b Mon Sep 17 00:00:00 2001
From: Philipp Rudiger <philippjfr@continuum.io>
Date: Sun, 7 Oct 2018 16:32:30 +0100
Subject: [PATCH] Fixed warnings when using matplotlib >= 3.0 (#3053)

---
 holoviews/plotting/mpl/plot.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/holoviews/plotting/mpl/plot.py b/holoviews/plotting/mpl/plot.py
index b4bc9c26fa..8666f7da52 100644
--- a/holoviews/plotting/mpl/plot.py
+++ b/holoviews/plotting/mpl/plot.py
@@ -28,7 +28,8 @@ def _rc_context(rcparams):
     deprecated = ['text.latex.unicode', 'examples.directory']
     old_rcparams = {k: mpl.rcParams[k] for k in mpl.rcParams.keys()
                     if mpl_version < '3.0' or k not in deprecated}
-    mpl.rcParams.update(rcparams)
+    mpl.rcParams.clear()
+    mpl.rcParams.update(dict(old_rcparams, **rcparams))
     try:
         yield
     finally: