diff --git a/science/misc/wcslib/pspec.xml b/science/misc/wcslib/pspec.xml
index 47ddbfa2c6..851802a467 100644
--- a/science/misc/wcslib/pspec.xml
+++ b/science/misc/wcslib/pspec.xml
@@ -12,7 +12,7 @@
         <IsA>library</IsA>
         <Summary>A C library that implements the 'World Coordinate System' (WCS) standard in FITS</Summary>
         <Description>The FITS "World Coordinate System" (WCS) standard defines keywords and usage that provide for the description of astronomical coordinate systems in a FITS image header.</Description>
-        <Archive sha1sum="b15fe328325d5eea3f9d058295d670ad003d7b7e" type="tarbz2">ftp://ftp.atnf.csiro.au/pub/software/wcslib/wcslib-5.19.1.tar.bz2</Archive>
+        <Archive sha1sum="9da495e27919ab8c66c21397c3134a26a04d1f09" type="tarbz2">ftp://ftp.atnf.csiro.au/pub/software/wcslib/wcslib-6.4.tar.bz2</Archive>
       <BuildDependencies>
             <Dependency>gcc</Dependency>
             <Dependency>flex</Dependency>
@@ -47,6 +47,13 @@
     </Package>
 
     <History>
+        <Update release="6">
+            <Date>2020-01-27</Date>
+            <Version>6.4</Version>
+            <Comment>Version bump.</Comment>
+            <Name>Mustafa Cinasal</Name>
+            <Email>muscnsl@gmail.com</Email>
+        </Update>
         <Update release="5">
             <Date>2018-09-07</Date>
             <Version>5.19.1</Version>