diff --git a/Project.toml b/Project.toml
index a052fd1..4c677cc 100644
--- a/Project.toml
+++ b/Project.toml
@@ -15,7 +15,8 @@ julia = "1.10"
 [extras]
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 SafeTestsets = "1bc83da4-3b8d-516f-aca4-4fe02f6d838f"
+JET = "c3a54625-cd67-489e-a8e7-0a5a0ff4e31b"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["Aqua", "Test", "SafeTestsets"]
+test = ["Aqua", "Test", "SafeTestsets", "JET"]
diff --git a/src/cells/fastrnn_cell.jl b/src/cells/fastrnn_cell.jl
index 9f49341..3aa61f5 100644
--- a/src/cells/fastrnn_cell.jl
+++ b/src/cells/fastrnn_cell.jl
@@ -137,7 +137,7 @@ end
 
 function Base.show(io::IO, fastrnn::FastRNN)
     print(io, "FastRNN(", size(fastrnn.cell.Wi, 2), " => ", size(fastrnn.cell.Wi, 1))
-    print(io, ", ", fastgrnn.cell.activation)
+    print(io, ", ", fastrnn.cell.activation)
     print(io, ")")
 end
 
diff --git a/src/cells/rhn_cell.jl b/src/cells/rhn_cell.jl
index 1ee74c9..b60a2f7 100644
--- a/src/cells/rhn_cell.jl
+++ b/src/cells/rhn_cell.jl
@@ -113,7 +113,7 @@ end
 
 function (rhn::RHNCell)(inp::AbstractArray, state::AbstractVecOrMat)
 
-    current_state = state
+    current_state = colify(state)
 
     for (i, layer) in enumerate(rhn.layers.layers)
         if i == 1
@@ -190,4 +190,11 @@ end
 function (rhn::RHN)(inp::AbstractArray, state::AbstractVecOrMat)
     @assert ndims(inp) == 2 || ndims(inp) == 3
     return scan(rhn.cell, inp, state)
+end
+
+function colify(x::AbstractArray)
+    # If x is already 2D (e.g. (N,1)), leave it.
+    # If x is 1D (N,), reshape to (N, 1).
+    ndims(x) == 1 && return reshape(x, (length(x), 1))
+    return x
 end
\ No newline at end of file
diff --git a/src/wrappers/stackedrnn.jl b/src/wrappers/stackedrnn.jl
index b200849..8761449 100644
--- a/src/wrappers/stackedrnn.jl
+++ b/src/wrappers/stackedrnn.jl
@@ -51,9 +51,11 @@ function StackedRNN(rlayer, (input_size, hidden_size)::Pair, args...;
 end
 
 function (stackedrnn::StackedRNN)(inp::AbstractArray)
-    for (idx,(layer, state)) in enumerate(zip(stackedrnn.layers, stackedrnn.states))
-        inp = layer(inp, state)
-        if !(idx == length(stackedrnn.layers))
+    @assert length(stackedrnn.layers) == length(stackedrnn.states) "Mismatch in layers vs. states length!"
+    @assert !isempty(stackedrnn.layers) "StackedRNN has no layers!"
+    for idx in eachindex(stackedrnn.layers)
+        inp = stackedrnn.layers[idx](inp, stackedrnn.states[idx])
+        if idx != length(stackedrnn.layers)
             inp = stackedrnn.dropout(inp)
         end
     end
diff --git a/test/qa.jl b/test/qa.jl
index 736cbce..49ca321 100644
--- a/test/qa.jl
+++ b/test/qa.jl
@@ -1,4 +1,6 @@
 using RecurrentLayers
 using Aqua
+using JET
 
 Aqua.test_all(RecurrentLayers; ambiguities=false, deps_compat=(check_extras = false))
+JET.test_package(RecurrentLayers)
\ No newline at end of file