diff --git a/poetry.lock b/poetry.lock
index af5abc65..7b9a1494 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1525,26 +1525,38 @@ diagrams = ["jinja2", "railroad-diagrams"]
 
 [[package]]
 name = "pyshtools"
-version = "4.12.2"
+version = "4.13.1"
 description = "SHTOOLS - Spherical Harmonic Tools"
 optional = false
 python-versions = ">=3.9"
 files = [
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+    {file = "pyshtools-4.13.1.tar.gz", hash = "sha256:cc4a323e9cbc905c04ae9e2e9fedeea6d76f3315a6863ede353a4dec87b8c018"},
 ]
 
 [package.dependencies]
 astropy = ">=4.0"
 matplotlib = ">=3.3"
-numpy = "*"
+numpy = ">=1.23.5"
 pooch = ">=1.1"
 requests = "*"
 scipy = ">=0.14.0"