diff --git a/PyEMD/CEEMDAN.py b/PyEMD/CEEMDAN.py
index 0761bfa..95e6982 100644
--- a/PyEMD/CEEMDAN.py
+++ b/PyEMD/CEEMDAN.py
@@ -19,7 +19,7 @@
 
 
 class CEEMDAN:
-    """
+    r"""
     **"Complete Ensemble Empirical Mode Decomposition with Adaptive Noise"**
 
     "Complete ensemble empirical mode decomposition with adaptive
diff --git a/PyEMD/EEMD.py b/PyEMD/EEMD.py
index e4ebe2b..075b949 100644
--- a/PyEMD/EEMD.py
+++ b/PyEMD/EEMD.py
@@ -22,7 +22,7 @@
 
 
 class EEMD:
-    """
+    r"""
     **Ensemble Empirical Mode Decomposition**
 
     Ensemble empirical mode decomposition (EEMD) [Wu2009]_