diff --git a/config/config.default.yaml b/config/config.default.yaml
index 42132f22..0db6dc03 100644
--- a/config/config.default.yaml
+++ b/config/config.default.yaml
@@ -770,7 +770,7 @@ solving:
 
   solver_options:
     highs-default:
-      # refer to https://ergo-code.github.io/HiGHS/options/definitions.html#solver
+      # refer to https://ergo-code.github.io/HiGHS/dev/options/definitions/
       threads: 4
       solver: "ipm"
       run_crossover: "off"
diff --git a/doc/configtables/solving.csv b/doc/configtables/solving.csv
index 7189399b..4d245195 100644
--- a/doc/configtables/solving.csv
+++ b/doc/configtables/solving.csv
@@ -20,7 +20,7 @@ constraints ,,,
 -- BAU,bool,"{'true','false'}",Add a per-``carrier`` minimal overall capacity; i.e. at least ``40GW`` of ``OCGT`` in Europe; configured in ``electricity: BAU_mincapacities``
 -- SAFE,bool,"{'true','false'}",Add a capacity reserve margin of a certain fraction above the peak demand to which renewable generators and storage do *not* contribute. Ignores network.
 solver,,,
--- name,--,"One of {'gurobi', 'cplex', 'cbc', 'glpk', 'ipopt'}; potentially more possible",Solver to use for optimisation problems in the workflow; e.g. clustering and linear optimal power flow.
+-- name,--,"One of {'gurobi', 'cplex', 'highs', 'cbc', 'glpk'}; potentially more possible",Solver to use for optimisation problems in the workflow; e.g. clustering and linear optimal power flow.
 -- options,--,Key listed under ``solver_options``.,Link to specific parameter settings.
 solver_options,,dict,Dictionaries with solver-specific parameter settings.
 mem,MB,int,Estimated maximum memory requirement for solving networks.
diff --git a/doc/installation.rst b/doc/installation.rst
index dd5c912e..45404e1f 100644
--- a/doc/installation.rst
+++ b/doc/installation.rst
@@ -62,7 +62,7 @@ PyPSA is known to work with the free software
 - `HiGHS <https://highs.dev/>`__
 - `Cbc <https://projects.coin-or.org/Cbc#DownloadandInstall>`__
 - `GLPK <https://www.gnu.org/software/glpk/>`__ (`WinGLKP <http://winglpk.sourceforge.net/>`__)
-- `Ipopt <https://coin-or.github.io/Ipopt/INSTALL.html>`__
+- `SCIP <https://scipopt.github.io/PySCIPOpt/docs/html/index.html>`__
 
 and the non-free, commercial software (for some of which free academic licenses are available)
 
@@ -80,7 +80,7 @@ Nevertheless, you can still use open-source solvers for smaller problems.
 
 .. note::
     The rules :mod:`cluster_network` and :mod:`simplify_network` solve a mixed-integer quadratic optimisation problem for clustering.
-    The open-source solvers HiGHS, Cbc and GlPK cannot handle this. A fallback to SCIP is implemented in this case.
+    The open-source solvers HiGHS, Cbc and GlPK cannot handle this. A fallback to SCIP is implemented in this case, which is included in the standard environment specifications.
     For an open-source solver setup install in your ``conda`` environment on OSX/Linux. To install the default solver Gurobi, run
 
     .. code:: bash