diff --git a/linx/reactions.py b/linx/reactions.py
index ce2102e..f3f29cd 100644
--- a/linx/reactions.py
+++ b/linx/reactions.py
@@ -149,7 +149,8 @@ def __init__(
                 self.expsigma_vec = jax.device_put(
                     self.expsigma_vec, device=gpus[0]
                 )
-            except: 
+            except (RuntimeError, IndexError):
+                # No GPU available or no GPU devices found - data stays on CPU
                 pass
 
         elif frwrd_rate_param_func is not None: 
diff --git a/linx/thermo.py b/linx/thermo.py
index 85cff9d..161c888 100644
--- a/linx/thermo.py
+++ b/linx/thermo.py
@@ -671,7 +671,8 @@ def p_massive_MB(T, mu, m, g):
     f_numu_ann_tab = device_put(
         f_numu_ann_tab, device=gpus[0]
     )
-except: 
+except (RuntimeError, IndexError):
+    # No GPU available or no GPU devices found - data stays on CPU
     pass
 
 
diff --git a/linx/weak_rates.py b/linx/weak_rates.py
index 71940c7..e187ce1 100644
--- a/linx/weak_rates.py
+++ b/linx/weak_rates.py
@@ -102,7 +102,8 @@ def __init__(self,
                 self.L_nTOpCCRTh_res = jax.device_put(
                     self.L_nTOpCCRTh_res, device=gpus[0]
                 )
-            except: 
+            except (RuntimeError, IndexError):
+                # No GPU available or no GPU devices found - data stays on CPU
                 pass
 
             self.T_pTOn_thermal_interval, self.L_pTOnCCRTh_res = np.loadtxt(
@@ -119,7 +120,8 @@ def __init__(self,
                 self.L_pTOnCCRTh_res = jax.device_put(
                     self.L_pTOnCCRTh_res, device=gpus[0]
                 )
-            except: 
+            except (RuntimeError, IndexError):
+                # No GPU available or no GPU devices found - data stays on CPU
                 pass
 
         else: