diff --git a/science/dynare/Makefile b/science/dynare/Makefile
index abbb4eeac311..59e21deada34 100644
--- a/science/dynare/Makefile
+++ b/science/dynare/Makefile
@@ -1,54 +1,55 @@
 PORTNAME=	dynare
-DISTVERSION=	5.0
-PORTREVISION=	1
+DISTVERSION=	5.1
 CATEGORIES=	science # economics
 MASTER_SITES=	https://www.dynare.org/release/source/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Software platform for handling a wide class of economic models
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BROKEN_aarch64=	cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
 
 BUILD_DEPENDS=	${LOCALBASE}/include/boost/tokenizer.hpp:devel/boost-libs
 LIB_DEPENDS=	libhdf5.so:science/hdf5 \
 		libmatio.so:math/matio \
 		libopenblas.so:math/openblas \
 		libsz.so:science/szip
 RUN_DEPENDS=	epstool:graphics/epstool \
 		gnuplot:math/gnuplot \
 		pstoedit:graphics/pstoedit \
 		xfig:graphics/xfig # README says that these executables are required for the test suite
 
 USES=		bison compiler:c++17-lang fortran gmake localbase tar:xz
 USE_TEX=	pdftex
 USE_GCC=	yes # clang-11 fails: error: reference to local binding 'ii1' declared in enclosing function 'ss2Iteration_pruning'
 		# Clang still doesn't support this c++20 feature, see https://bugs.llvm.org/show_bug.cgi?id=49238
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--disable-matlab \
 		--disable-doc
 
+FCFLAGS+=	-fPIC # required because configure tests with -shared
+
 SUB_FILES=	pkg-message
 
 OPTIONS_DEFINE=			OCTAVE
 OPTIONS_DEFAULT=		OCTAVE
 OPTIONS_SUB=			yes
 
 OCTAVE_DESC=			Integrate with Octave (main way to use Dynare)
 OCTAVE_CONFIGURE_ENABLE=	octave
 OCTAVE_CONFIGURE_ON=		--disable-mex-kalman-steady-state # Kalman Steady State MEX file for Octave - requires the non-free library slicot-5.0
 OCTAVE_BUILD_DEPENDS=		octave:math/octave
 OCTAVE_LIB_DEPENDS=		libfftw3.so:math/fftw3 \
 				libfftw3f.so:math/fftw3-float \
 				libgsl.so:math/gsl \
 				libumfpack.so:math/suitesparse-umfpack
 OCTAVE_RUN_DEPENDS=		octave:math/octave
 
 post-install:
 	# remove empty directories, see https://git.dynare.org/Dynare/dynare/-/issues/1835
 	@${FIND} ${STAGEDIR}${PREFIX} -type d -empty -delete
 
 .include <bsd.port.mk>
diff --git a/science/dynare/distinfo b/science/dynare/distinfo
index 116f66c866c2..e3cf82deeed3 100644
--- a/science/dynare/distinfo
+++ b/science/dynare/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1641668510
-SHA256 (dynare-5.0.tar.xz) = 557bc7d8d7bbbf7d4746dd1e015b273eeeb0b53dc66b9d4004d2efef8f4fe16e
-SIZE (dynare-5.0.tar.xz) = 17863188
+TIMESTAMP = 1650690087
+SHA256 (dynare-5.1.tar.xz) = 269b2b52d9e7af0bf06041b48e730dd5c2fb89577bed24ad5e4b51e0dca9dbbe
+SIZE (dynare-5.1.tar.xz) = 18000696
diff --git a/science/dynare/files/patch-mex_build_octave_configure b/science/dynare/files/patch-mex_build_octave_configure
new file mode 100644
index 000000000000..774083adc441
--- /dev/null
+++ b/science/dynare/files/patch-mex_build_octave_configure
@@ -0,0 +1,88 @@
+- remove fortran-related crashing section when fortran compiler is checked for cross-compilation
+- it's unclear why the fortran-built executable crashes
+
+--- mex/build/octave/configure.orig	2022-04-23 05:48:46 UTC
++++ mex/build/octave/configure
+@@ -3332,44 +3332,44 @@ _ACEOF
+ ac_clean_files="$ac_clean_files conftest.out"
+ # Check that the compiler produces executables we can run.  If not, either
+ # the compiler is broken, or we cross compile.
+-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+-$as_echo_n "checking whether we are cross compiling... " >&6; }
+-if test "$cross_compiling" != yes; then
+-  { { ac_try="$ac_link"
+-case "(($ac_try" in
+-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+-  *) ac_try_echo=$ac_try;;
+-esac
+-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+-$as_echo "$ac_try_echo"; } >&5
+-  (eval "$ac_link") 2>&5
+-  ac_status=$?
+-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+-  test $ac_status = 0; }
+-  if { ac_try='./conftest$ac_cv_exeext'
+-  { { case "(($ac_try" in
+-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+-  *) ac_try_echo=$ac_try;;
+-esac
+-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+-$as_echo "$ac_try_echo"; } >&5
+-  (eval "$ac_try") 2>&5
+-  ac_status=$?
+-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+-  test $ac_status = 0; }; }; then
+-    cross_compiling=no
+-  else
+-    if test "$cross_compiling" = maybe; then
+-	cross_compiling=yes
+-    else
+-	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+-as_fn_error $? "cannot run Fortran compiled programs.
+-If you meant to cross compile, use \`--host'.
+-See \`config.log' for more details" "$LINENO" 5; }
+-    fi
+-  fi
+-fi
++#{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
++#$as_echo_n "checking whether we are cross compiling... " >&6; }
++#if test "$cross_compiling" != yes; then
++#  { { ac_try="$ac_link"
++#case "(($ac_try" in
++#  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
++#  *) ac_try_echo=$ac_try;;
++#esac
++#eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
++#$as_echo "$ac_try_echo"; } >&5
++#  (eval "$ac_link") 2>&5
++#  ac_status=$?
++#  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
++#  test $ac_status = 0; }
++#  if { ac_try='./conftest$ac_cv_exeext'
++#  { { case "(($ac_try" in
++#  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
++#  *) ac_try_echo=$ac_try;;
++#esac
++#eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
++#$as_echo "$ac_try_echo"; } >&5
++#  (eval "$ac_try") 2>&5
++#  ac_status=0
++#  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
++#  test $ac_status = 0; }; }; then
++#    cross_compiling=no
++#  else
++#    if test "$cross_compiling" = maybe; then
++#	cross_compiling=yes
++#    else
++#	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
++#$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
++#as_fn_error $? "cannot run Fortran compiled programs.
++#If you meant to cross compile, use \`--host'.
++#See \`config.log' for more details" "$LINENO" 5; }
++#    fi
++#  fi
++#fi
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+ $as_echo "$cross_compiling" >&6; }
+ 
diff --git a/science/dynare/files/patch-preprocessor_src_EquationTags.cc b/science/dynare/files/patch-preprocessor_src_EquationTags.cc
deleted file mode 100644
index 01f3951c5975..000000000000
--- a/science/dynare/files/patch-preprocessor_src_EquationTags.cc
+++ /dev/null
@@ -1,12 +0,0 @@
-- backport of fix: https://git.dynare.org/Dynare/preprocessor/-/commit/8c528f4f9a15baf73c014e1c3e55bc13583ca09d
-
---- preprocessor/src/EquationTags.cc.orig	2022-01-10 23:30:53 UTC
-+++ preprocessor/src/EquationTags.cc
-@@ -20,6 +20,7 @@
- #include "EquationTags.hh"
- 
- #include <regex>
-+#include <ostream>
- 
- set<int>
- EquationTags::getEqnsByKey(const string &key) const