diff --git a/examples/rivers/make_river_clim.py b/examples/rivers/make_river_clim.py
index 2386324..598053d 100644
--- a/examples/rivers/make_river_clim.py
+++ b/examples/rivers/make_river_clim.py
@@ -54,7 +54,7 @@
 	        frac = 1.0/count[j,i]
 		k = rivers[j,i][n]
 		runoff[k] = frac*data[t,j,i]
-	        
+
 
     if t==180:
         sum180 = np.sum(runoff)
diff --git a/pycnal_toolbox/pycnal_toolbox/BGrid_GFDL/flood.py b/pycnal_toolbox/pycnal_toolbox/BGrid_GFDL/flood.py
index 6f86fb6..4006664 100644
--- a/pycnal_toolbox/pycnal_toolbox/BGrid_GFDL/flood.py
+++ b/pycnal_toolbox/pycnal_toolbox/BGrid_GFDL/flood.py
@@ -103,6 +103,6 @@ def flood(varz, Bgrdz, Bpos='t', irange=None, jrange=None, \
     for i in range(Lm):
         for j in range(Mm):
             if mask[j,i] == 1:
-                varz[bottom[j,i]:,j,i] = varz[bottom[j,i],j,i]
+                varz[int(bottom[j,i]):,j,i] = varz[int(bottom[j,i]),j,i]
 
     return varz
diff --git a/pycnal_toolbox/pycnal_toolbox/BGrid_GFDL/get_nc_BGrid_GFDL.py b/pycnal_toolbox/pycnal_toolbox/BGrid_GFDL/get_nc_BGrid_GFDL.py
index 99a052a..ca12364 100644
--- a/pycnal_toolbox/pycnal_toolbox/BGrid_GFDL/get_nc_BGrid_GFDL.py
+++ b/pycnal_toolbox/pycnal_toolbox/BGrid_GFDL/get_nc_BGrid_GFDL.py
@@ -38,7 +38,7 @@ def get_nc_BGrid_GFDL(grdfile, name='GFDL_CM2.1_North_Pacific', \
     for j in range(M_t):
         for i in range(L_t):
             try:
-                mask_t[0:kmt[j,i], j,i] = 1
+                mask_t[0:int(kmt[j,i]), j,i] = 1
             except:
                 mask_t[:, j,i] = 0
 
@@ -49,7 +49,7 @@ def get_nc_BGrid_GFDL(grdfile, name='GFDL_CM2.1_North_Pacific', \
     for j in range(M_uv):
         for i in range(L_uv):
             try:
-                mask_uv[0:kmu[j,i], j,i] = 1
+                mask_uv[0:int(kmu[j,i]), j,i] = 1
             except:
                 mask_uv[:, j,i] = 0