diff --git a/.travis.yml b/.travis.yml
index bcfc9423..c37e7a90 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,8 +3,8 @@ language: julia
 os:
   - linux
 julia:
-  - 1.3
   - 1.4
+  - 1.5
   - nightly
 git:
   depth: 999999
@@ -37,19 +37,19 @@ jobs:
     - julia: nightly
   include:
     # Add a job that uses the privileged builder with squashfs shards
-    - julia: 1.3
+    - julia: 1.4
       env:
         - BINARYBUILDER_RUNNER=privileged
         - BINARYBUILDER_USE_SQUASHFS=true
 
     # Add a job that uses the unprivileged builder with unpacked shards
-    - julia: 1.3.0
+    - julia: 1.4
       env:
         - BINARYBUILDER_RUNNER=unprivileged
         - BINARYBUILDER_USE_SQUASHFS=false
 
     # Add a job that uses the docker builder with unpacked shards
-    - julia: 1.3.0
+    - julia: 1.4
       env:
         - BINARYBUILDER_RUNNER=docker
         - BINARYBUILDER_USE_SQUASHFS=false
diff --git a/Project.toml b/Project.toml
index c4d5a9e1..05081265 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "BinaryBuilderBase"
 uuid = "7f725544-6523-48cd-82d1-3fa08ff4056e"
 authors = ["Elliot Saba <staticfloat@gmail.com>"]
-version = "0.3.1"
+version = "0.4.0"
 
 [deps]
 CodecZlib = "944b1d66-785c-5afd-91f1-9de20f533193"
@@ -19,7 +19,7 @@ UUIDs = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 CodecZlib = "0.5, 0.6, 0.7"
 JSON = "0.21"
 OutputCollectors = "0.1"
-julia = "1.3"
+julia = "1.4"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
diff --git a/src/Dependencies.jl b/src/Dependencies.jl
index 0f0a927e..b070fdb8 100644
--- a/src/Dependencies.jl
+++ b/src/Dependencies.jl
@@ -47,11 +47,6 @@ getpkg(d::AbstractDependency) = d.pkg
 getname(x::PkgSpec) = x.name
 getname(x::AbstractDependency) = getname(getpkg(x))
 
-# compatibility for Julia 1.3-
-if VERSION < v"1.4"
-    Pkg.Types.registry_resolve!(ctx::Pkg.Types.Context, deps) = Pkg.Types.registry_resolve!(ctx.env, deps)
-end
-
 # Wrapper around `Pkg.Types.registry_resolve!` which keeps the type of the
 # dependencies.  TODO: improve this
 function registry_resolve!(ctx, dependencies::Vector{<:AbstractDependency})
diff --git a/src/Prefix.jl b/src/Prefix.jl
index 28f05ec4..33caa6b4 100644
--- a/src/Prefix.jl
+++ b/src/Prefix.jl
@@ -412,11 +412,7 @@ function setup_dependencies(prefix::Prefix, dependencies::Vector{PkgSpec}, platf
 
         # Load their Artifacts.toml files
         for dep in installed_jlls
-            if VERSION >= v"1.4.0-rc2.0"
-                dep_path = Pkg.Operations.source_path(ctx, dep)
-            else
-                dep_path = Pkg.Operations.source_path(dep)
-            end
+            dep_path = Pkg.Operations.source_path(ctx, dep)
             name = getname(dep)
 
             # Skip dependencies that didn't get installed?