diff --git a/linopy/solvers.py b/linopy/solvers.py
index a121a2b5..023dcb5d 100644
--- a/linopy/solvers.py
+++ b/linopy/solvers.py
@@ -48,6 +48,7 @@
     "mosek",
     "copt",
     "mindopt",
+    "knitro",
 ]
 
 # Solvers that don't need a solution file when keep_files=False
@@ -145,6 +146,9 @@ class xpress_Namespaces:  # type: ignore[no-redef]
     except coptpy.CoptError:
         pass
 
+with contextlib.suppress(ModuleNotFoundError, ImportError):
+    pass
+
 quadratic_solvers = [s for s in QUADRATIC_SOLVERS if s in available_solvers]
 logger = logging.getLogger(__name__)
 
@@ -176,6 +180,7 @@ class SolverName(enum.Enum):
     COPT = "copt"
     MindOpt = "mindopt"
     PIPS = "pips"
+    Knitro = "knitro"
 
 
 def path_to_string(path: Path) -> str:
diff --git a/pyproject.toml b/pyproject.toml
index b5105230..2370d0f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -58,6 +58,7 @@ docs = [
     "gurobipy==11.0.2",
     "ipykernel==6.29.5",
     "matplotlib==3.9.1",
+    "knitro>=15.0.1",
 ]
 dev = [
     "pytest",
@@ -70,6 +71,7 @@ dev = [
     "types-requests",
     "gurobipy",
     "highspy",
+    "knitro",
 ]
 solvers = [
     "gurobipy",
@@ -81,6 +83,7 @@ solvers = [
     "coptpy!=7.2.1",
     "xpress; platform_system != 'Darwin' and python_version < '3.11'",
     "pyscipopt; platform_system != 'Darwin'",
+    "knitro>=15.0.1",
 ]
 
 [tool.setuptools.packages.find]