--- a/Cargo.toml
+++ b/Cargo.toml
@@ -66,4 +66,4 @@
 version = "0.5"
 
 [dev-dependencies.rand]
-version = "0.9"
+version = "0.8"
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -824,9 +824,9 @@
             let mut out_a = c2r.make_output_vec();
             let mut indata = c2r.make_input_vec();
             let mut rustfft_check: Vec<Complex<f64>> = vec![Complex::zero(); length];
-            let mut rng = rand::rng();
+            let mut rng = rand::thread_rng();
             for val in indata.iter_mut() {
-                *val = Complex::new(rng.random::<f64>(), rng.random::<f64>());
+                *val = Complex::new(rng.gen::<f64>(), rng.gen::<f64>());
             }
             indata[0].im = 0.0;
             if length % 2 == 0 {
@@ -873,9 +873,9 @@
             let mut out_a = c2r.make_output_vec();
             let mut indata = c2r.make_input_vec();
             let mut rustfft_check: Vec<Complex<f32>> = vec![Complex::zero(); length];
-            let mut rng = rand::rng();
+            let mut rng = rand::thread_rng();
             for val in indata.iter_mut() {
-                *val = Complex::new(rng.random::<f32>(), rng.random::<f32>());
+                *val = Complex::new(rng.gen::<f32>(), rng.gen::<f32>());
             }
             indata[0].im = 0.0;
             if length % 2 == 0 {
@@ -921,11 +921,11 @@
         let c2r = real_planner.plan_fft_inverse(length);
         let mut out_a = c2r.make_output_vec();
         let mut indata = c2r.make_input_vec();
-        let mut rng = rand::rng();
+        let mut rng = rand::thread_rng();
 
         // Make some valid data
         for val in indata.iter_mut() {
-            *val = Complex::new(rng.random::<f64>(), rng.random::<f64>());
+            *val = Complex::new(rng.gen::<f64>(), rng.gen::<f64>());
         }
         indata[0].im = 0.0;
         indata[50].im = 0.0;
@@ -934,7 +934,7 @@
 
         // Make some invalid data, first point invalid
         for val in indata.iter_mut() {
-            *val = Complex::new(rng.random::<f64>(), rng.random::<f64>());
+            *val = Complex::new(rng.gen::<f64>(), rng.gen::<f64>());
         }
         indata[50].im = 0.0;
         let res = c2r.process(&mut indata, &mut out_a);
@@ -943,7 +943,7 @@
 
         // Make some invalid data, last point invalid
         for val in indata.iter_mut() {
-            *val = Complex::new(rng.random::<f64>(), rng.random::<f64>());
+            *val = Complex::new(rng.gen::<f64>(), rng.gen::<f64>());
         }
         indata[0].im = 0.0;
         let res = c2r.process(&mut indata, &mut out_a);
@@ -959,11 +959,11 @@
         let c2r = real_planner.plan_fft_inverse(length);
         let mut out_a = c2r.make_output_vec();
         let mut indata = c2r.make_input_vec();
-        let mut rng = rand::rng();
+        let mut rng = rand::thread_rng();
 
         // Make some valid data
         for val in indata.iter_mut() {
-            *val = Complex::new(rng.random::<f64>(), rng.random::<f64>());
+            *val = Complex::new(rng.gen::<f64>(), rng.gen::<f64>());
         }
         indata[0].im = 0.0;
         // this should be ok
@@ -971,7 +971,7 @@
 
         // Make some invalid data, first point invalid
         for val in indata.iter_mut() {
-            *val = Complex::new(rng.random::<f64>(), rng.random::<f64>());
+            *val = Complex::new(rng.gen::<f64>(), rng.gen::<f64>());
         }
         let res = c2r.process(&mut indata, &mut out_a);
         assert!(res.is_err());
@@ -986,9 +986,9 @@
             let r2c = real_planner.plan_fft_forward(length);
             let mut out_a = r2c.make_output_vec();
             let mut indata = r2c.make_input_vec();
-            let mut rng = rand::rng();
+            let mut rng = rand::thread_rng();
             for val in indata.iter_mut() {
-                *val = rng.random::<f64>();
+                *val = rng.gen::<f64>();
             }
             let mut rustfft_check = indata
                 .iter()
@@ -1024,9 +1024,9 @@
             let r2c = real_planner.plan_fft_forward(length);
             let mut out_a = r2c.make_output_vec();
             let mut indata = r2c.make_input_vec();
-            let mut rng = rand::rng();
+            let mut rng = rand::thread_rng();
             for val in indata.iter_mut() {
-                *val = rng.random::<f32>();
+                *val = rng.gen::<f32>();
             }
             let mut rustfft_check = indata
                 .iter()