diff --git a/pyproject.toml b/pyproject.toml
index a4210dcb9..e5780533a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,11 +23,12 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13"
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.9,<3.14"
 dependencies = [
-    "numpy",
+    "numpy<2.0", # numpy 2.0 introduces breaking changes in relation to qgis versions
+    "salib<1.5.1", # this is the last aversion that works with numpy <2.
+    "pyshp<3.0", # pin until 3.0.3 is out, there's a known bug for certain polygon types
     "matplotlib",
-    "pyshp",
     "scipy",
     "cmcrameri",
     "seaborn",
@@ -43,7 +44,6 @@ dependencies = [
     "contextily",
     "geopandas",
     "fiona",
-    "salib"
 ]
 
 # Setuptools
@@ -86,9 +86,12 @@ channels = ["https://prefix.dev/conda-forge"]
 platforms = ["linux-64", "win-64", "osx-64"]
 
 [tool.pixi.dependencies]
+python = "<3.14"
 setuptools = "*"
 setuptools-scm = "*"
 cibuildwheel = "*"
+# FSO: remove as soon as possible
+libgdal = "*"
 
 # Feature dev
 [tool.pixi.feature.dev.pypi-dependencies]
@@ -111,12 +114,17 @@ sphinxcontrib-bibtex = "*"
 [tool.pixi.feature.prod.pypi-dependencies]
 avaframe = "*"
 
+#Feature py313
+[tool.pixi.feature.py313.dependencies]
+python = "==3.13.7"
+
 #Feature rcs
-[tool.pixi.feature.rcs.pypi-dependencies]
-avaframe = "==1.13rc4"
+#[tool.pixi.feature.rcs.pypi-dependencies]
+#avaframe = "==1.13rc4"
 
 #Feature qgis
 [tool.pixi.feature.qgis.dependencies]
+numpy = "<2.0"
 qgis = "*"
 
 #Environments
@@ -125,6 +133,7 @@ default = { features = ["dev"], solve-group = "default" }
 dev = ["dev"]
 doc = ["doc", "dev"]
 prod = ["prod"]
-rcs = ["rcs"]
+#rcs = ["rcs"]
+py313 = ["py313", "dev"]
 qgis = ["qgis", "dev"]