diff --git a/science/gwyddion/Portfile b/science/gwyddion/Portfile
index 7059543cf700..4b11321c7040 100644
--- a/science/gwyddion/Portfile
+++ b/science/gwyddion/Portfile
@@ -3,7 +3,7 @@
 PortSystem          1.0
 
 name                gwyddion
-version             2.63
+version             2.66
 revision            0
 categories          science x11
 platforms           darwin
@@ -20,9 +20,9 @@ master_sites        sourceforge:project/gwyddion/gwyddion/${version}
 use_xz              yes
 use_parallel_build  yes
 
-checksums           sha256  152b3f0db9ebd6c844c3f5b9d4385414f6fad6d33ed1ab5ceb0c58f351224dd3 \
-                    rmd160  5293607528e81ffe1f428bfd6da7e583a6603302 \
-                    size    5324664
+checksums           sha256  377bedcd2b0d8d133a329686da9f5f91807ff1d47937f9991195f1e863792d52 \
+                    rmd160  9dda736b0717d682560d847241b6a86ad48faf6a \
+                    size    5390884
 
 depends_build       port:pkgconfig