diff --git a/math/ruby-algebra/Makefile b/math/ruby-algebra/Makefile
index 5abec179245a..5da7aff7d688 100644
--- a/math/ruby-algebra/Makefile
+++ b/math/ruby-algebra/Makefile
@@ -6,7 +6,7 @@
 #
 
 PORTNAME=	algebra
-PORTVERSION=	0.55
+PORTVERSION=	0.56
 CATEGORIES=	math ruby
 MASTER_SITES=	http://blade.nagaokaut.ac.jp/~sinara/ruby/math/
 PKGNAMEPREFIX=	${RUBY_PKGNAMEPREFIX}
@@ -21,6 +21,9 @@ NO_BUILD=	yes
 DOCS_EN=	doc/*.txt	doc/*.rd	doc/*.html
 DOCS_JA=	doc-jp/*.txt	doc-jp/*.rd	doc-jp/*.html
 
+post-extract:
+	${RM} ${WRKSRC}/test1.rb ${WRKSRC}/m-index-*.rb
+
 do-install:
 	${INSTALL_DATA} ${WRKSRC}/*.rb ${RUBY_SITELIBDIR}/
 .if !defined(NOPORTDOCS)
diff --git a/math/ruby-algebra/distinfo b/math/ruby-algebra/distinfo
index e71c59f33324..089960d162b1 100644
--- a/math/ruby-algebra/distinfo
+++ b/math/ruby-algebra/distinfo
@@ -1 +1 @@
-MD5 (ruby/algebra-0.55.tar.gz) = d4fc9f8e5a6b4f8b60a1986b9d2873f0
+MD5 (ruby/algebra-0.56.tar.gz) = 0f8d0ee9be3a74a7feb53041285116d4