diff --git a/Project.toml b/Project.toml
index db93019..72cc596 100644
--- a/Project.toml
+++ b/Project.toml
@@ -18,10 +18,26 @@ Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 WebIO = "0f1e0344-ec1d-5b48-a673-e5cf874b6c29"
 
+[weakdeps]
+CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
+DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
+IJulia = "7073ff75-c697-5162-941a-fcdaad2a7d2a"
+JSON3 = "0f8b85d8-7281-11e9-16c2-39a750bddbf1"
+
+[extensions]
+CSVExt = "CSV"
+DataFramesExt = ["DataFrames", "CSV"]
+IJuliaExt = "IJulia"
+JSON3Ext = "JSON3"
+
 [compat]
 Blink = "0.12"
+CSV = "0.10"
+DataFrames = "1"
+IJulia = "1"
 JSExpr = "0.5, 1"
 JSON = "0.20, 0.21"
+JSON3 = "1"
 PlotlyBase = "0.8.15"
 Reexport = "0.2, 1"
 Requires = "1.0"
@@ -29,7 +45,11 @@ WebIO = "0.8"
 julia = "1.3, 1.4, 1.5, 1.6"
 
 [extras]
+CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
+DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
+IJulia = "7073ff75-c697-5162-941a-fcdaad2a7d2a"
+JSON3 = "0f8b85d8-7281-11e9-16c2-39a750bddbf1"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["Test"]
+test = ["Test", "CSV", "DataFrames", "IJulia", "JSON3"]
diff --git a/ext/CSVExt.jl b/ext/CSVExt.jl
new file mode 100644
index 0000000..fef2330
--- /dev/null
+++ b/ext/CSVExt.jl
@@ -0,0 +1,14 @@
+module CSVExt
+
+using PlotlyJS
+isdefined(Base, :get_extension) ? (using CSV) : (using ..CSV)
+
+function PlotlyJS.dataset(::Type{CSV.File}, name::String)
+    ds_path = PlotlyJS.check_dataset_exists(name)
+    if !endswith(ds_path, "csv")
+        error("Can only construct CSV.File from a csv data source")
+    end
+    CSV.File(ds_path)
+end
+
+end
\ No newline at end of file
diff --git a/ext/DataFramesExt.jl b/ext/DataFramesExt.jl
new file mode 100644
index 0000000..bc3333e
--- /dev/null
+++ b/ext/DataFramesExt.jl
@@ -0,0 +1,10 @@
+module DataFramesExt
+
+using PlotlyJS
+isdefined(Base, :get_extension) ? (using DataFrames) : (using ..DataFrames)
+isdefined(Base, :get_extension) ? (using CSV) : (using ..CSV)
+
+
+PlotlyJS.dataset(::Type{DataFrames.DataFrame}, name::String) = DataFrames.DataFrame(PlotlyJS.dataset(CSV.File, name))
+
+end
\ No newline at end of file
diff --git a/ext/IJuliaExt.jl b/ext/IJuliaExt.jl
new file mode 100644
index 0000000..9bf1974
--- /dev/null
+++ b/ext/IJuliaExt.jl
@@ -0,0 +1,21 @@
+module IJuliaExt
+
+using PlotlyJS
+isdefined(Base, :get_extension) ? (using IJulia) : (using ..IJulia)
+isdefined(Base, :get_extension) ? (using JSON) : (using ..JSON)
+isdefined(Base, :get_extension) ? (using PlotlyBase) : (using ..PlotlyBase)
+
+
+function IJulia.display_dict(p::PlotlyJS.SyncPlot)
+    Dict(
+        "application/vnd.plotly.v1+json" => JSON.lower(p),
+        "text/plain" => sprint(show, "text/plain", p),
+        "text/html" => let
+            buf = IOBuffer()
+            show(buf, MIME("text/html"), p)
+            String(resize!(buf.data, buf.size))
+        end
+    )
+end
+
+end
diff --git a/ext/JSON3Ext.jl b/ext/JSON3Ext.jl
new file mode 100644
index 0000000..1b0ed83
--- /dev/null
+++ b/ext/JSON3Ext.jl
@@ -0,0 +1,9 @@
+module JSON3Ext
+
+using PlotlyJS
+isdefined(Base, :get_extension) ? (using JSON3) : (using ..JSON3)
+
+JSON3.write(io::IO, p::PlotlyJS.SyncPlot) = JSON3.write(io, p.plot)
+JSON3.write(p::PlotlyJS.SyncPlot) = JSON3.write(p.plot)
+
+end
diff --git a/src/PlotlyJS.jl b/src/PlotlyJS.jl
index 36a221b..0d3b252 100644
--- a/src/PlotlyJS.jl
+++ b/src/PlotlyJS.jl
@@ -19,7 +19,9 @@ using JSExpr
 using JSExpr: @var, @new
 using Blink
 using Pkg.Artifacts
-using Requires
+if !isdefined(Base, :get_extension)
+    using Requires
+end
 
 export plot, dataset, list_datasets, make_subplots, savefig, mgrid
 
@@ -131,37 +133,15 @@ function __init__()
         insert!(Base.Multimedia.displays, findlast(x -> x isa REPL.REPLDisplay, Base.Multimedia.displays) + 1, PlotlyJSDisplay())
     end)
 
-    @require JSON2 = "2535ab7d-5cd8-5a07-80ac-9b1792aadce3" JSON2.write(io::IO, p::SyncPlot) = JSON2.write(io, p.plot)
-    @require JSON3 = "0f8b85d8-7281-11e9-16c2-39a750bddbf1" begin
-        JSON3.write(io::IO, p::SyncPlot) = JSON.print(io, p.plot)
-        JSON3.write(p::SyncPlot) = JSON.json(p.plot)
-    end
-
-    @require IJulia = "7073ff75-c697-5162-941a-fcdaad2a7d2a" begin
-
-        function IJulia.display_dict(p::SyncPlot)
-            Dict(
-                "application/vnd.plotly.v1+json" => JSON.lower(p),
-                "text/plain" => sprint(show, "text/plain", p),
-                "text/html" => let
-                    buf = IOBuffer()
-                    show(buf, MIME("text/html"), p)
-                    String(resize!(buf.data, buf.size))
-                end
-            )
-        end
-    end
+    @static if !isdefined(Base, :get_extension)
+        @require JSON3 = "0f8b85d8-7281-11e9-16c2-39a750bddbf1" include("../ext/JSON3Ext.jl")
+        @require IJulia = "7073ff75-c697-5162-941a-fcdaad2a7d2a" include("../ext/IJuliaExt.jl")
 
-    @require CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b" begin
-        function dataset(::Type{CSV.File}, name::String)
-            ds_path = check_dataset_exists(name)
-            if !endswith(ds_path, "csv")
-                error("Can only construct CSV.File from a csv data source")
+        @require CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b" begin
+            include("../ext/CSVExt.jl")
+            @require DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0" begin
+                include("../ext/DataFramesExt.jl")
             end
-            CSV.File(ds_path)
-        end
-        @require DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0" begin
-            dataset(::Type{DataFrames.DataFrame}, name::String) = DataFrames.DataFrame(dataset(CSV.File, name))
         end
     end