diff --git a/src/layers/conv.jl b/src/layers/conv.jl
index 94a10606..41f0e2e3 100644
--- a/src/layers/conv.jl
+++ b/src/layers/conv.jl
@@ -60,8 +60,8 @@ function Conv(w::AbstractArray{T,N}, b::Union{Zeros, AbstractVector{T}}, σ = id
   return Conv(σ, w, b, stride, pad, dilation)
 end
 
-function Conv(;weight::AbstractArray, bias::Union{Zeros, AbstractVector{T}}, activation = identity,
-              stride = 1, pad = 0, dilation = 1) where {T,N}
+function Conv(;weight::AbstractArray{T,N}, bias::Union{Zeros, AbstractVector{T}},
+              activation = identity, stride = 1, pad = 0, dilation = 1) where {T,N}
   Conv(weight, bias, activation, stride = stride, pad = pad, dilation = dilation)
 end
 
@@ -268,7 +268,7 @@ function DepthwiseConv(w::AbstractArray{T,N}, b::Union{Zeros, AbstractVector{T}}
   return DepthwiseConv(σ, w, b, stride, pad, dilation)
 end
 
-function DepthwiseConv(;weight::AbstractArray, bias::Union{Zeros, AbstractVector{T}},
+function DepthwiseConv(;weight::AbstractArray{T,N}, bias::Union{Zeros, AbstractVector{T}},
                       activation = identity, stride = 1, pad = 0, dilation = 1) where {T,N}
   DepthwiseConv(weight, bias, activation, stride = stride, pad = pad, dilation = dilation)
 end
@@ -379,7 +379,7 @@ function CrossCor(w::AbstractArray{T,N}, b::Union{Zeros, AbstractVector{T}}, σ
   return CrossCor(σ, w, b, stride, pad, dilation)
 end
 
-function CrossCor(;weight::AbstractArray, bias::Union{Zeros, AbstractVector{T}},
+function CrossCor(;weight::AbstractArray{T,N}, bias::Union{Zeros, AbstractVector{T}},
                       activation = identity, stride = 1, pad = 0, dilation = 1) where {T,N}
   CrossCor(weight, bias, activation, stride = stride, pad = pad, dilation = dilation)
 end