diff --git a/src/series.jl b/src/series.jl
index 8b3f19bb..9af76774 100644
--- a/src/series.jl
+++ b/src/series.jl
@@ -627,7 +627,7 @@ group_as_matrix(t) = false
     else
         g = args[1]
         if length(g.args) == 1
-            x = zeros(Int64, lengthGroup)
+            x = zeros(Int, lengthGroup)
             for indexes in groupby.groupIds
                 x[indexes] = 1:length(indexes)
             end
diff --git a/src/utils.jl b/src/utils.jl
index 8ee4a656..1bfc2651 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -201,7 +201,7 @@ function iter_segments(series::Series)
             return [i:(i + 1) for i in 1:(length(y) - 1)]
         end
     else
-        segs = UnitRange{Int64}[]
+        segs = UnitRange{Int}[]
         args = is3d(series) ? (x, y, z) : (x, y)
         for seg in iter_segments(args...)
             push!(segs, seg)