diff --git a/.gitignore b/.gitignore
index 5bf3500..e61c1a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,3 +33,4 @@ ENV/
 
 # SNYK
 .dccache
+poetry.lock
diff --git a/pyproject.toml b/pyproject.toml
index 5f3bbb2..3be11bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,14 +6,15 @@ authors = ["Even Solbraa <esolbraa@gmail.com>"]
 license = "Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/Equinor/neqsimpython"
-classifiers = [
-        "Operating System :: OS Independent",
-]
+classifiers = ["Operating System :: OS Independent"]
 
 [tool.poetry.dependencies]
 python = "^3.8"
 JPype1 = "^1.5.0"
-pandas = "^2.0.3"
+pandas = [
+        { version = "^1.3.5", markers = "python_version == '3.8'" },
+        { version = "^2.0.3", markers = "python_version > '3.8'" },
+]
 matplotlib = { version = "^3.7.0", optional = true }
 jupyter = { version = "^1.0.0", optional = true }
 tabulate = { version = "^0.9.0", optional = true }