diff --git a/Project.toml b/Project.toml
index 995839b0..b99cdf35 100644
--- a/Project.toml
+++ b/Project.toml
@@ -27,4 +27,4 @@ JSON = "0.18,0.19,0.20,0.21,1"
 MbedTLS = "0.5,0.6,0.7,1"
 SoftGlobalScope = "1"
 ZMQ = "1.3"
-julia = "1.6"
+julia = "1.10"
diff --git a/src/IJulia.jl b/src/IJulia.jl
index 4d5a4469..58553f18 100644
--- a/src/IJulia.jl
+++ b/src/IJulia.jl
@@ -36,7 +36,7 @@ export notebook, jupyterlab, installkernel
 using ZMQ, JSON, SoftGlobalScope
 import Base.invokelatest
 import Dates
-using Dates: now
+using Dates: now, format, UTC, ISODateTimeFormat
 import Random
 using Base64: Base64EncodePipe
 import REPL
@@ -285,7 +285,7 @@ function clear_output(wait=false)
     # flush pending stdio
     flush_all()
     empty!(displayqueue) # discard pending display requests
-    send_ipython(publish[], msg_reply(execute_msg::Msg, "clear_output",
+    send_ipython(publish[], msg_pub(execute_msg::Msg, "clear_output",
                                     Dict("wait" => wait)))
     stdio_bytes[] = 0 # reset output throttling
 end
diff --git a/src/comm_manager.jl b/src/comm_manager.jl
index 17319b71..0d37f862 100644
--- a/src/comm_manager.jl
+++ b/src/comm_manager.jl
@@ -59,7 +59,7 @@ function comm_info_request(sock, msg)
     end
     content = Dict(:comms => _comms)
 
-    send_ipython(IJulia.publish[],
+    send_ipython(sock,
                  msg_reply(msg, "comm_info_reply", content))
 end
 
diff --git a/src/display.jl b/src/display.jl
index 2659b576..2fdbd4bf 100644
--- a/src/display.jl
+++ b/src/display.jl
@@ -48,6 +48,7 @@ register_jsonmime(x::AbstractVector{<:MIME}) = push!(ijulia_jsonmime_types, Vect
 # return a String=>Any dictionary to attach as metadata
 # in Jupyter display_data and pyout messages
 metadata(x) = Dict()
+transient(x) = Dict()
 
 """
 Generate the preferred MIME representation of x.
diff --git a/src/handlers.jl b/src/handlers.jl
index 52630953..dc658b91 100644
--- a/src/handlers.jl
+++ b/src/handlers.jl
@@ -154,11 +154,11 @@ function complete_request(socket, msg)
 end
 
 function kernel_info_request(socket, msg)
-    send_ipython(requests[],
+    send_ipython(socket,
                  msg_reply(msg, "kernel_info_reply",
-                           Dict("protocol_version" => "5.0",
+                           Dict("protocol_version" => "5.4",
                                         "implementation" => "ijulia",
-                                        # TODO: "implementation_version" => IJulia version string from Pkg
+                                        "implementation_version" => pkgversion(@__MODULE__),
                                         "language_info" =>
                                         Dict("name" => "julia",
                                              "version" =>
@@ -274,7 +274,7 @@ end
 
 function interrupt_request(socket, msg)
     @async Base.throwto(requests_task[], InterruptException())
-    send_ipython(requests[], msg_reply(msg, "interrupt_reply", Dict()))
+    send_ipython(socket, msg_reply(msg, "interrupt_reply", Dict()))
 end
 
 function unknown_request(socket, msg)
diff --git a/src/inline.jl b/src/inline.jl
index 2ef69587..339d05ad 100644
--- a/src/inline.jl
+++ b/src/inline.jl
@@ -62,6 +62,7 @@ for mime in ipy_mime
                          msg_pub(execute_msg, "display_data",
                                  Dict(
                                   "metadata" => metadata(x), # optional
+                                  "transient" => transient(x), # optional
                                   "data" => Dict($mime => limitstringmime(MIME($mime), x)))))
         end
         displayable(d::InlineDisplay, ::MIME{Symbol($mime)}) = true
@@ -87,6 +88,7 @@ function display(d::InlineDisplay, M::MIME, x)
     send_ipython(publish[],
                  msg_pub(execute_msg, "display_data",
                          Dict("metadata" => metadata(x), # optional
+                              "transient" => transient(x), # optional
                               "data" => d)))
 end
 
@@ -98,6 +100,7 @@ function display(d::InlineDisplay, x)
     send_ipython(publish[],
                  msg_pub(execute_msg, "display_data",
                          Dict("metadata" => metadata(x), # optional
+                              "transient" => transient(x), # optional
                               "data" => display_dict(x))))
 end
 
diff --git a/src/msg.jl b/src/msg.jl
index 74012b81..c34a107a 100644
--- a/src/msg.jl
+++ b/src/msg.jl
@@ -18,9 +18,9 @@ end
 msg_header(m::Msg, msg_type::String) = Dict("msg_id" => uuid4(),
                                             "username" => m.header["username"],
                                             "session" => m.header["session"],
-                                            "date" => now(),
+                                            "date" => format(now(UTC), ISODateTimeFormat)*"Z",
                                             "msg_type" => msg_type,
-                                            "version" => "5.3")
+                                            "version" => "5.4")
 
 # PUB/broadcast messages use the msg_type as the ident, except for
 # stream messages which use the stream name (e.g. "stdout").
@@ -32,7 +32,7 @@ msg_pub(m::Msg, msg_type, content, metadata=Dict{String,Any}()) =
       msg_header(m, msg_type), content, m.header, metadata)
 
 msg_reply(m::Msg, msg_type, content, metadata=Dict{String,Any}()) =
-  Msg(m.idents, msg_header(m, msg_type), content, m.header, metadata)
+  Msg(m.idents, msg_header(m, msg_type), merge(Dict("status" => "ok"), content), m.header, metadata)
 
 function show(io::IO, msg::Msg)
     print(io, "IPython Msg [ idents ")