diff --git a/Project.toml b/Project.toml
index e20d2dc..bdc3435 100644
--- a/Project.toml
+++ b/Project.toml
@@ -19,7 +19,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-BandedMatrices = "0.12"
+BandedMatrices = "0.12, 0.13"
 BlockArrays = "0.10"
 FillArrays = "0.7"
 LazyArrays = "0.12"
diff --git a/src/BlockSkylineMatrix.jl b/src/BlockSkylineMatrix.jl
index 02755d5..da5bdb0 100644
--- a/src/BlockSkylineMatrix.jl
+++ b/src/BlockSkylineMatrix.jl
@@ -6,7 +6,7 @@ checkbandwidths(N, M, l::AbstractVector{Int}, u::AbstractVector{Int}) =
 function bb_blockstarts(b_size, l::AbstractVector{Int}, u::AbstractVector{Int})
     N,M = nblocks(b_size)
     L,U = maximum(l), maximum(u)
-    b_start = BandedMatrix{Int}(undef, N, M, L, U)
+    b_start = BandedMatrix{Int}(undef, (N, M), (L, U))
     -L > U && return b_start
 
     checkbandwidths(N, M, l, u)