diff --git a/Project.toml b/Project.toml
index a8a7b45..c65846a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -6,12 +6,19 @@ version = "0.1.3-DEV"
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
 
+[weakdeps]
+Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
+
+[extensions]
+ReferenceablesAdaptExt = "Adapt"
+
 [compat]
 Adapt = "2, 3, 4"
 julia = "1"
 
 [extras]
+Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["Test"]
+test = ["Test", "Adapt"]
diff --git a/ext/ReferenceablesAdaptExt.jl b/ext/ReferenceablesAdaptExt.jl
new file mode 100644
index 0000000..b4b6bcf
--- /dev/null
+++ b/ext/ReferenceablesAdaptExt.jl
@@ -0,0 +1,7 @@
+module ReferenceablesAdaptExt
+import Referenceables: Referenceable, referenceable
+import Adapt
+
+Adapt.adapt_structure(to, x::Referenceable) = referenceable(Adapt.adapt(to, parent(x)))
+
+end
diff --git a/src/Referenceables.jl b/src/Referenceables.jl
index f581a17..6a822db 100644
--- a/src/Referenceables.jl
+++ b/src/Referenceables.jl
@@ -2,8 +2,6 @@ module Referenceables
 
 export referenceable
 
-import Adapt
-
 # Use markdown files as the docstring:
 for (name, path) in [
     :Referenceables => joinpath(dirname(@__DIR__), "README.md"),
@@ -98,6 +96,8 @@ isreferenceable(xs) = _valtype(xs) <: RefIndexable
 _valtype(xs) = valtype(xs)
 _valtype(xs::AbstractArray) = eltype(xs)  # for old Julia
 
-Adapt.adapt_structure(to, x::Referenceable) = referenceable(Adapt.adapt(to, parent(x)))
+if !isdefined(Base, :get_extension)
+    include("../ext/ReferenceablesAdaptExt.jl")
+end
 
 end # module