diff --git a/.travis.yml b/.travis.yml
index b26597e9..c03f1de7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,5 +15,5 @@ matrix:
   allow_failures:
     - julia: nightly
 after_success:
-  - julia -e 'using Pkg; Pkg.add("Documenter"); Pkg.add("NNlib")'
+  - julia -e 'using Pkg; ps=Pkg.PackageSpec(name="Documenter", version="0.19"); Pkg.add(ps); Pkg.pin(ps); Pkg.add("NNlib")'
   - julia -e 'using Pkg; cd(Pkg.dir("Flux")); include(joinpath("docs", "make.jl"))'