diff --git a/src/canonical.jl b/src/canonical.jl
index 7228153..f2d1dda 100644
--- a/src/canonical.jl
+++ b/src/canonical.jl
@@ -106,12 +106,12 @@ A.metabolite_notes(m::Model, id::String) = m.metabolites[id].notes
 A.gene_notes(m::Model, id::String) = m.genes[id].notes
 
 function A.stoichiometry(m::Model)
-    midxs = Dict(mid => idx for (idx,(mid,_)) = enumerate(m.metabolites))
+    midxs = Dict(mid => idx for (idx, (mid, _)) in enumerate(m.metabolites))
     I = Int[]
     J = Int[]
     V = Float64[]
-    for (ridx, (_, r)) = enumerate(m.reactions)
-        for (smid, v) = r.stoichiometry
+    for (ridx, (_, r)) in enumerate(m.reactions)
+        for (smid, v) in r.stoichiometry
             push!(I, midxs[smid])
             push!(J, ridx)
             push!(V, v)
diff --git a/src/io.jl b/src/io.jl
index 96ed54e..343539e 100644
--- a/src/io.jl
+++ b/src/io.jl
@@ -70,7 +70,7 @@ $(TYPEDSIGNATURES)
 Helper for nicely showing the contents of possibly complicated model
 structures.
 """
-function pretty_print_kwdef(io::Base.IO, x::T) where T
+function pretty_print_kwdef(io::Base.IO, x::T) where {T}
     println(io, "$T(")
     (_, cols) = displaysize(io)
     for fn in fieldnames(T)