diff --git a/lang/eisl/Makefile b/lang/eisl/Makefile
index 863cd99605e2..80417857d615 100644
--- a/lang/eisl/Makefile
+++ b/lang/eisl/Makefile
@@ -1,49 +1,49 @@
 PORTNAME=	eisl
 DISTVERSIONPREFIX=	v
-DISTVERSION=	5.39
+DISTVERSION=	5.41
 CATEGORIES=	lang devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Interpreter and compiler compatible with ISLisp standard
 WWW=		https://github.com/sasagawa888/eisl
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/license.txt
 
 BROKEN_armv7=	stage breaks: Abort trap (likely due to the memory allocation problem)
 BROKEN_i386=	stage breaks: data segment of more than 500GB is required, see https://github.com/sasagawa888/eisl/issues/218
 
 TEST_DEPENDS=	cppcheck:devel/cppcheck
 
 USES=		gmake gl localbase:ldflags ncurses:port tcl # port because tests need ncurses6-config
 USE_GL=		gl glu glut
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	sasagawa888
 
 ALL_TARGET=	${PORTNAME}
 TEST_TARGET=	check # tests print some errors and warnings, see https://github.com/sasagawa888/eisl/issues/181#issuecomment-1195147029
 
 MAKEFILE=	makefile
 
 CFLAGS+=	-D__BSD_VISIBLE # w/out this there's error: use of undeclared identifier '_SC_NPROCESSORS_CONF'
 CFLAGS+=	-I${TCL_INCLUDEDIR}
 LDFLAGS+=	-lncursesw
 
 .include <bsd.port.options.mk>
 
 .if ${ARCH} == riscv64
 EXTRA_PATCHES=	${FILESDIR}/extra-patch-makefile
 .endif
 
 .include <bsd.port.pre.mk>
 
 .if ${OPSYS} == FreeBSD
 CFLAGS+=	-Wno-error=int-conversion
 .endif
 
 .if ${OPSYS} == FreeBSD
 CFLAGS+=	-Wno-error=incompatible-function-pointer-types
 .endif
 
 .include <bsd.port.post.mk>
diff --git a/lang/eisl/distinfo b/lang/eisl/distinfo
index 27c0faa32667..cfba6b9dfc3b 100644
--- a/lang/eisl/distinfo
+++ b/lang/eisl/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1734590966
-SHA256 (sasagawa888-eisl-v5.39_GH0.tar.gz) = 8602d4e9caec43df9be34046eac8c2587a852c7773aa90ebb098ca8509edf9e7
-SIZE (sasagawa888-eisl-v5.39_GH0.tar.gz) = 3137025
+TIMESTAMP = 1737619148
+SHA256 (sasagawa888-eisl-v5.41_GH0.tar.gz) = af19ab13c5de4d41c09eb539ee8964cde48982a2a96c764a8818e236b1d5d6f0
+SIZE (sasagawa888-eisl-v5.41_GH0.tar.gz) = 3140179
diff --git a/lang/eisl/pkg-plist b/lang/eisl/pkg-plist
index b4940a98f0e2..07c76e689536 100644
--- a/lang/eisl/pkg-plist
+++ b/lang/eisl/pkg-plist
@@ -1,61 +1,62 @@
 bin/edlis
 bin/eisl
 %%DATADIR%%/fast.h
 %%DATADIR%%/ffi.h
 %%DATADIR%%/library/bit.lsp
 %%DATADIR%%/library/bit.o
 %%DATADIR%%/library/combination.lsp
 %%DATADIR%%/library/compiler.lsp
 %%DATADIR%%/library/complex.lsp
 %%DATADIR%%/library/cross.lsp
 %%DATADIR%%/library/csv.lsp
 %%DATADIR%%/library/cxr.lsp
 %%DATADIR%%/library/datetime.lsp
 %%DATADIR%%/library/datetime.o
 %%DATADIR%%/library/distributed.lsp
 %%DATADIR%%/library/elixir.lsp
 %%DATADIR%%/library/escape.lsp
 %%DATADIR%%/library/escape.o
 %%DATADIR%%/library/formatter.lsp
 %%DATADIR%%/library/formula.lsp
 %%DATADIR%%/library/functions-data.lsp
 %%DATADIR%%/library/functions-dataj.lsp
 %%DATADIR%%/library/functions.lsp
 %%DATADIR%%/library/functionsj.lsp
 %%DATADIR%%/library/hash.lsp
 %%DATADIR%%/library/i18n.lsp
 %%DATADIR%%/library/i18n.o
 %%DATADIR%%/library/lazy.lsp
 %%DATADIR%%/library/list.lsp
 %%DATADIR%%/library/logger.lsp
 %%DATADIR%%/library/logger.o
 %%DATADIR%%/library/macro.lsp
 %%DATADIR%%/library/math.lsp
 %%DATADIR%%/library/matrix.lsp
 %%DATADIR%%/library/mexp.lsp
 %%DATADIR%%/library/ndbm.lsp
 %%DATADIR%%/library/ndbm.o
 %%DATADIR%%/library/opengl.lsp
 %%DATADIR%%/library/opengl.o
 %%DATADIR%%/library/persist.lsp
 %%DATADIR%%/library/plot.lsp
 %%DATADIR%%/library/plot.o
 %%DATADIR%%/library/pretty.lsp
 %%DATADIR%%/library/prolog.lsp
 %%DATADIR%%/library/prolog.o
 %%DATADIR%%/library/quaternion.lsp
 %%DATADIR%%/library/queue.lsp
+%%DATADIR%%/library/rational.lsp
 %%DATADIR%%/library/regex.lsp
 %%DATADIR%%/library/regex.o
 %%DATADIR%%/library/roman.lsp
 %%DATADIR%%/library/sedit.lsp
 %%DATADIR%%/library/seq.lsp
 %%DATADIR%%/library/sort.lsp
 %%DATADIR%%/library/stat.lsp
 %%DATADIR%%/library/string.lsp
 %%DATADIR%%/library/tcltk.lsp
 %%DATADIR%%/library/test.lsp
 %%DATADIR%%/library/unistd.lsp
 %%DATADIR%%/library/unistd.o
 %%DATADIR%%/library/virtty.lsp
 %%DATADIR%%/library/virtty.o