diff --git a/YAML-LibYAML-0.51-format-error.patch b/YAML-LibYAML-0.51-format-error.patch
deleted file mode 100644
index 415e64b..0000000
--- a/YAML-LibYAML-0.51-format-error.patch
+++ /dev/null
@@ -1,38 +0,0 @@
---- LibYAML/perl_libyaml.c
-+++ LibYAML/perl_libyaml.c
-@@ -188,7 +188,7 @@ Load(SV *yaml_sv)
-     return;
- 
- load_error:
--    croak(loader_error_msg(&loader, NULL));
-+    croak("%s", loader_error_msg(&loader, NULL));
- }
- 
- /*
-@@ -271,7 +271,7 @@ load_node(perl_yaml_loader_t *loader)
-     return return_sv;
- 
-     load_error:
--        croak(loader_error_msg(loader, NULL));
-+        croak("%s", loader_error_msg(loader, NULL));
- }
- 
- /*
-@@ -314,7 +314,7 @@ load_mapping(perl_yaml_loader_t *loader,
-         else if (strlen(tag) <= strlen(prefix) ||
-             ! strnEQ(tag, prefix, strlen(prefix))
-         ) croak(
--            loader_error_msg(loader, form("bad tag found for hash: '%s'", tag))
-+            "%s", loader_error_msg(loader, form("bad tag found for hash: '%s'", tag))
-         );
-         class = tag + strlen(prefix);
-         sv_bless(hash_ref, gv_stashpv(class, TRUE));
-@@ -347,7 +347,7 @@ load_sequence(perl_yaml_loader_t *loader
-         else if (strlen(tag) <= strlen(prefix) ||
-             ! strnEQ(tag, prefix, strlen(prefix))
-         ) croak(
--            loader_error_msg(loader, form("bad tag found for array: '%s'", tag))
-+            "%s", loader_error_msg(loader, form("bad tag found for array: '%s'", tag))
-         );
-         class = tag + strlen(prefix);
-         sv_bless(array_ref, gv_stashpv(class, TRUE));
diff --git a/perl-YAML-LibYAML.spec b/perl-YAML-LibYAML.spec
index 896060c..4d6d6c7 100644
--- a/perl-YAML-LibYAML.spec
+++ b/perl-YAML-LibYAML.spec
@@ -1,18 +1,15 @@
 Name:           perl-YAML-LibYAML
-Version:        0.55
+Version:        0.57
 Release:        1%{?dist}
 Summary:        Perl YAML Serialization using XS and libyaml
 License:        GPL+ or Artistic
 Group:          Development/Libraries
 URL:            http://search.cpan.org/dist/YAML-LibYAML/
-Source0:        http://search.cpan.org/CPAN/authors/id/I/IN/INGY/YAML-LibYAML-%{version}.tar.gz
-Patch0:         YAML-LibYAML-0.51-format-error.patch
+Source0:        http://search.cpan.org/CPAN/authors/id/N/NA/NAWGLAN/YAML-LibYAML-%{version}.tar.gz
 
 # Install
 BuildRequires:  perl
-BuildRequires:  perl(ExtUtils::MakeMaker) >= 6.30
-BuildRequires:  perl(File::Find)
-BuildRequires:  perl(File::Path)
+BuildRequires:  perl(ExtUtils::MakeMaker)
 
 # Module
 BuildRequires:  perl >= 3:5.8.3
@@ -29,6 +26,8 @@ BuildRequires:  libyaml, libyaml-devel
 BuildRequires:  perl(Carp)
 BuildRequires:  perl(Data::Dumper)
 BuildRequires:  perl(Devel::Peek)
+BuildRequires:  perl(File::Find)
+BuildRequires:  perl(File::Path)
 BuildRequires:  perl(Filter::Util::Call)
 BuildRequires:  perl(lib)
 BuildRequires:  perl(Scalar::Util)
@@ -52,9 +51,6 @@ bound to Python and was later bound to Ruby.
 %prep
 %setup -q -n YAML-LibYAML-%{version}
 
-# Fix format string vulnerabilities (CVE-2012-1152, CPAN RT#46507)
-%patch0
-
 %build
 perl Makefile.PL INSTALLDIRS=vendor OPTIMIZE="%{optflags}"
 make %{?_smp_mflags}
@@ -78,6 +74,14 @@ make test
 %{_mandir}/man3/YAML::XS::LibYAML.3*
 
 %changelog
+* Fri Jan 16 2015 Paul Howarth <paul@city-fan.org> - 0.57-1
+- Update to 0.57
+  - Update copyright year
+  - Use Swim cpan-tail block functions in doc
+  - Format string fixes (PR#21, CPAN RT#46507, CVE-2012-1152)
+- This release by NAWGLAN → update source URL
+- Drop patch for format string fixes, upstreamed at long last
+
 * Wed Dec 24 2014 Paul Howarth <paul@city-fan.org> - 0.55-1
 - Update to 0.55
   - Get YAML::XS using latest libyaml
diff --git a/sources b/sources
index 06c26f1..71a3322 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-d48db921392b0ea6cf49fc0edebd0a3f  YAML-LibYAML-0.55.tar.gz
+6ac5aa764d55395175d7c6f60e606ce0  YAML-LibYAML-0.57.tar.gz