diff --git a/perl-DateTime-Format-Strptime.spec b/perl-DateTime-Format-Strptime.spec
index 8931832..8205cc1 100644
--- a/perl-DateTime-Format-Strptime.spec
+++ b/perl-DateTime-Format-Strptime.spec
@@ -1,6 +1,6 @@
 Name:           perl-DateTime-Format-Strptime
 Epoch:          1
-Version:        1.72
+Version:        1.73
 Release:        1%{?dist}
 Summary:        Parse and format strptime and strftime patterns
 License:        Artistic 2.0
@@ -74,6 +74,11 @@ make test
 %{_mandir}/man3/DateTime::Format::Strptime::Types.3*
 
 %changelog
+* Wed Feb  1 2017 Paul Howarth <paul@city-fan.org> - 1:1.73-1
+- Update to 1.73
+  - The format_datetime method now checks that the object it is given isa
+    DateTime object (GH#17)
+
 * Wed Jan 25 2017 Paul Howarth <paul@city-fan.org> - 1:1.72-1
 - Update to 1.72
   - By default, the word boundary checks added in 1.69 are now off; you can
diff --git a/sources b/sources
index fefca78..903fb22 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (DateTime-Format-Strptime-1.72.tar.gz) = 0a6b43298997714362350ecfe6093b48ef96ab322f84abf84505c227daf042c948282497de09a5848b92e75ae59c134b1c6ea0fb0b81e5385a63c81b8c81ef5e
+SHA512 (DateTime-Format-Strptime-1.73.tar.gz) = c259473e1120a9e40020cba2c7d008227521dbca0d2906878ee75e1ebc58e82760386bb32ebb1e987e68dfa4ce7f1e532dc4bfdf70467383425705e3f1c18d15