diff --git a/dynare-5.4.tar.xz b/dynare-5.4.tar.xz
deleted file mode 100644
index 6677fcb..0000000
--- a/dynare-5.4.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:c174a3ebcaf8c4566b9836abad8c04148011bec2ec610ded234f406bfbdd10f8
-size 18005284
diff --git a/dynare-5.5.tar.xz b/dynare-5.5.tar.xz
new file mode 100644
index 0000000..353fd3c
--- /dev/null
+++ b/dynare-5.5.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:11deae32997e79e500a9802c6408067749485ea7ef3c08bbf24141f2b0e00326
+size 17924820
diff --git a/dynare-add-missing-include.patch b/dynare-add-missing-include.patch
deleted file mode 100644
index 2dea556..0000000
--- a/dynare-add-missing-include.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-Index: dynare-5.3/preprocessor/src/CodeInterpreter.hh
-===================================================================
---- dynare-5.3.orig/preprocessor/src/CodeInterpreter.hh
-+++ dynare-5.3/preprocessor/src/CodeInterpreter.hh
-@@ -22,6 +22,7 @@
- 
- #include <fstream>
- #include <cstring>
-+#include <cstdint>
- #include <utility>
- #include <vector>
- #ifdef BYTE_CODE
diff --git a/dynare.changes b/dynare.changes
index 4ec0c1b..8d4da25 100644
--- a/dynare.changes
+++ b/dynare.changes
@@ -1,3 +1,49 @@
+-------------------------------------------------------------------
+Wed Nov 22 11:54:45 UTC 2023 - Atri Bhattacharya <badshah400@gmail.com>
+
+- Update to version 5.5:
+  * In a stochastic context, results could be incorrect if an
+    endogenous with a lead ⩾ 2 or an exogenous with a lead ⩾ 1
+    appeared in the argument(s) of a call to a (nonlinear)
+    external function
+  * With the use_dll option of the model block, the expression
+    sign(x) would evaluate to ±1 instead of 0 if x=0
+  * If the guess value given to the steady command was such that
+    the residuals were all below tolerance, except some that are
+    NaN, then this guess value was incorrectly accepted as the
+    solution to the steady state problem
+  * The method_of_moments command with GMM was ignoring the
+    analytic_standard_errors option when using mode_compute=4
+  * Homotopy with the extended_path command at order=0 was broken
+  * The parallel_use_psexec command-line option was ignored
+  * With the bytecode option of the model block, using the
+    operators abs(), cbrt() and sign() would lead to a crash
+  * The fast command-line option was broken under MATLAB with
+    Windows
+  * Ramsey steady state computation could fail if an expectation
+    or diff operator was present in the model
+  * A crash could occur if some external function call was present
+    in an auxiliary variable
+  * The endogenous_prior option of the estimation command could
+    erroneously display a warning message about missing
+    observations
+  * The model_comparison command would crash if the .mod file name
+    had less than four characters
+  * The shock_decomposition command would overwrite previously
+    stored smoother results
+  * The x13 interface in dseries did not handle missing values,
+    particularly at the beginning of a series
+  * The x13 interface in dseries would occasionally crash under
+    Windows with segmentation violations
+  * OccBin: estimation would crash if a previous shocks(surprise)
+    simulation was conducted
+  * The internals command would not find the location of the
+    _results.mat file
+  * The prior optimize command would not work with mode_compute=5
+- Minor improvement to conditionals specifying the right version
+  of gcc to use.
+- Drop dynare-add-missing-include.patch: upstreamed.
+
 -------------------------------------------------------------------
 Wed Apr 12 04:31:04 UTC 2023 - Atri Bhattacharya <badshah400@gmail.com>
 
diff --git a/dynare.spec b/dynare.spec
index 3a125ea..9fa578f 100644
--- a/dynare.spec
+++ b/dynare.spec
@@ -22,11 +22,10 @@
 # Sphinx in Leap 15.x is too old
 %bcond_with doc
 %else
-%define gccver %{nil}
 %bcond_without doc
 %endif
 Name:           dynare
-Version:        5.4
+Version:        5.5
 Release:        0
 Summary:        A platform for handling a wide class of economic models
 License:        GPL-3.0-or-later
@@ -34,11 +33,9 @@ URL:            https://www.dynare.org/
 Source:         https://www.dynare.org/release/source/%{name}-%{version}.tar.xz
 # PATCH-FIX-UPSTREAM dynare-no-return-in-non-void-function.patch badshah400@gmail.com -- Return trivial value from a function that is not declared as returning void
 Patch0:         dynare-no-return-in-non-void-function.patch
-# PATCH-FIX-UPSTREAM dynare-add-missing-include.patch -- Add missing includes, gcc 13 exposed
-Patch1:         dynare-add-missing-include.patch
 BuildRequires:  fdupes
-BuildRequires:  gcc%{gccver}-c++
-BuildRequires:  gcc%{gccver}-fortran
+BuildRequires:  gcc%{?gccver}-c++
+BuildRequires:  gcc%{?gccver}-fortran
 BuildRequires:  lapack-devel
 BuildRequires:  libboost_headers-devel
 BuildRequires:  libtool
@@ -87,10 +84,7 @@ This package provides documentation for %{name} in HTML format.
 
 %build
 autoreconf -fvi
-%if 0%{?suse_version} < 1550
-export CXX=g++-%{gccver}
-export CXXFLAGS+=' -std=c++17'
-%endif
+export CXX=g++%{?gccver:-%{gccver}}
 %configure \
   --docdir=%{_docdir}/%{name} \
   --disable-matlab \