diff --git a/pyproject.toml b/pyproject.toml
index 8dbc9e997..71b7f28a3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,24 +23,24 @@ classifiers = [
     "Typing :: Typed",
 ]
 dependencies = [
-    "cmocean>=3.0.3",
-    "gmpy2>=2.1.5",
-    "hypothesis>=6.70.2",
-    "libigl>=2.4.1",
-    "matplotlib>=3.7.1",
-    "multiprocess>=0.70.14",
-    "numba>=0.56.4",
-    "numpy>=1.23.5",
-    "platformdirs>=3.2.0",
-    "plotly>=5.14.0",
-    "pooch>=1.7.0",
-    "pydantic>=2.3.0",
-    "pys2let>=2.2.6",
-    "pyssht>=1.5.2",
-    "scipy>=1.10.1",
-    "seaborn>=0.12.2",
-    "tomli>=2.0.1",
-    "tqdm>=4.65.0",
+    "cmocean~=3.0",
+    "gmpy2~=2.0",
+    "hypothesis~=6.0",
+    "libigl~=2.0",
+    "matplotlib~=3.0",
+    "multiprocess~=0.0",
+    "numba~=0.0",
+    "numpy~=1.0",
+    "platformdirs~=3.0",
+    "plotly~=5.0",
+    "pooch~=1.0",
+    "pydantic~=2.0",
+    "pys2let~=2.0",
+    "pyssht~=1.0",
+    "scipy~=1.0",
+    "seaborn~=0.0",
+    "tomli~=2.0",
+    "tqdm~=4.0",
 ]
 description = "Slepian Scale-Discretised Wavelets in Python"
 dynamic = [