diff --git a/oceans/plotting.py b/oceans/plotting.py
index a65f67a..1e28c31 100644
--- a/oceans/plotting.py
+++ b/oceans/plotting.py
@@ -43,7 +43,7 @@ def stick_plot(time, u, v, **kw):
     from pandas import DatetimeIndex
     from pandas.plotting import register_matplotlib_converters
 
-    register_matplotlib_converters(True)
+    register_matplotlib_converters()
 
     width = kw.pop("width", 0.002)
     headwidth = kw.pop("headwidth", 0)
diff --git a/requirements.txt b/requirements.txt
index 09d6543..d2f7363 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 gsw
 matplotlib
 numpy
+pandas>=1.0.1
 seawater