diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 04bbf98..d1b9464 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -15,8 +15,6 @@ jobs:
     runs-on: "ubuntu-22.04"
     steps:
       - uses: actions/checkout@v4
-      - name: Install dev-requirements
-        run: pip install -r dev-requirements.txt
       - uses: actions/cache@v4
         with:
           path: |
@@ -24,12 +22,17 @@ jobs:
             ~/.cargo/git
             target
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-      - name: Test
-        run: cargo test --release
-      - name: Test no numpy installed works
+      - name: Test no numpy
         run: |
-          pip uninstall numpy -y
           cargo test --release --features nonumpy
+      - name: Install numpy v1
+        run: pip install 'numpy>=1,<2' 'pandas>=1,<2'
+      - name: Test numpy v1
+        run: cargo test --release
+      - name: Install numpy v2
+        run: pip install 'numpy>=2,<3' 'pandas>=2,<3'
+      - name: Test numpy v2
+        run: cargo test --release
 
   build:
     if: ${{ startsWith(github.ref, 'refs/tags/') || github.event_name == 'workflow_dispatch' }}
diff --git a/dev-requirements.txt b/dev-requirements.txt
index 1417be9..f4ce98a 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,4 +1,4 @@
-maturin==0.14.*
+maturin==1.4.*
 numpy==1.*
 pandas==1.*
 numpy-financial==1.*
diff --git a/src/conversions.rs b/src/conversions.rs
index cc0eb48..ffca1c0 100644
--- a/src/conversions.rs
+++ b/src/conversions.rs
@@ -1,9 +1,6 @@
 use std::str::FromStr;
 
-use numpy::{
-    datetime::{units, Datetime as datetime64},
-    PyArray1,
-};
+use numpy::PyArray1;
 use pyo3::{
     exceptions::{PyTypeError, PyValueError},
     prelude::*,
@@ -101,15 +98,6 @@ impl From<&PyDate> for DateLike {
     }
 }
 
-impl From<&datetime64<units::Days>> for DateLike {
-    fn from(value: &datetime64<units::Days>) -> Self {
-        let days_since_unix_epoch: i32 = Into::<i64>::into(*value) as i32;
-        let date = Date::from_julian_day(UNIX_EPOCH_JULIAN_DAY + days_since_unix_epoch).unwrap();
-
-        date.into()
-    }
-}
-
 impl<'s> FromPyObject<'s> for DateLike {
     fn extract(obj: &'s PyAny) -> PyResult<Self> {
         if let Ok(py_date) = obj.downcast::<PyDate>() {
@@ -126,7 +114,7 @@ impl<'s> FromPyObject<'s> for DateLike {
         match obj.get_type().name()? {
             "datetime64" => Ok(obj
                 .call_method1("astype", ("datetime64[D]",))?
-                .call_method1("astype", ("int",))?
+                .call_method1("astype", ("int32",))?
                 .extract::<DaysSinceUnixEpoch>()?
                 .into()),
 
@@ -150,11 +138,12 @@ where
 fn extract_date_series_from_numpy(series: &PyAny) -> PyResult<Vec<DateLike>> {
     Ok(series
         .call_method1("astype", ("datetime64[D]",))?
-        .downcast::<PyArray1<datetime64<units::Days>>>()?
+        .call_method1("astype", ("int32",))?
+        .downcast::<PyArray1<i32>>()?
         .readonly()
         .as_slice()?
         .iter()
-        .map(|x| x.into())
+        .map(|&x| DateLike::from(DaysSinceUnixEpoch(x)))
         .collect())
 }