diff --git a/eqsig/__about__.py b/eqsig/__about__.py
index 943437f..fd9deaa 100644
--- a/eqsig/__about__.py
+++ b/eqsig/__about__.py
@@ -1,4 +1,4 @@
 __project__ = "eqsig"
 __author__ = "Maxim Millen"
-__version__ = "0.6.5"
+__version__ = "0.6.6"
 __license__ = "MIT"
diff --git a/eqsig/duhamels.py b/eqsig/duhamels.py
new file mode 100644
index 0000000..811b2c1
--- /dev/null
+++ b/eqsig/duhamels.py
@@ -0,0 +1,4 @@
+from eqsig.sdof import *
+from eqsig.exceptions import deprecation
+
+deprecation('eqsig.duhamels has deprecated, used eqsig.sdof')