diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 000000000..9498e50bc
Binary files /dev/null and b/.DS_Store differ
diff --git a/dist/react-datepicker.js b/dist/react-datepicker.js
index b14c03378..859a7cf53 100644
--- a/dist/react-datepicker.js
+++ b/dist/react-datepicker.js
@@ -1504,7 +1504,8 @@
                     return (t.buttonRef = e);
                   },
                   role: "option",
-                  tabIndex: "-1"
+                  tabIndex: "-1",
+                  type: "button"
                 },
                 this.props.renderDayContents
                   ? this.props.renderDayContents(
diff --git a/dist/react-datepicker.min.js b/dist/react-datepicker.min.js
index b14c03378..859a7cf53 100644
--- a/dist/react-datepicker.min.js
+++ b/dist/react-datepicker.min.js
@@ -1504,7 +1504,8 @@
                     return (t.buttonRef = e);
                   },
                   role: "option",
-                  tabIndex: "-1"
+                  tabIndex: "-1",
+                  type: "button"
                 },
                 this.props.renderDayContents
                   ? this.props.renderDayContents(
diff --git a/es/index.js b/es/index.js
index 4466b494a..b2a53f212 100644
--- a/es/index.js
+++ b/es/index.js
@@ -2220,7 +2220,8 @@ var Day =
                 return (_this2.buttonRef = r);
               },
               role: "option",
-              tabIndex: "-1"
+              tabIndex: "-1",
+              type: "button"
             },
             this.props.renderDayContents
               ? this.props.renderDayContents(
diff --git a/lib/index.js b/lib/index.js
index c6a79e5ba..a1885a831 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -2234,7 +2234,8 @@ var Day =
                 return (_this2.buttonRef = r);
               },
               role: "option",
-              tabIndex: "-1"
+              tabIndex: "-1",
+              type: "button"
             },
             this.props.renderDayContents
               ? this.props.renderDayContents(