diff --git a/src/ODEInterfaceDiffEq.jl b/src/ODEInterfaceDiffEq.jl
index 71007e8..e441e53 100644
--- a/src/ODEInterfaceDiffEq.jl
+++ b/src/ODEInterfaceDiffEq.jl
@@ -18,7 +18,7 @@ function __init__()
     global warnlist = Set(warnkeywords)
 end
 
-@compat const KW = Dict{Symbol,Any}
+const KW = Dict{Symbol,Any}
 
 include("algorithms.jl")
 include("integrator_types.jl")
diff --git a/src/algorithms.jl b/src/algorithms.jl
index b05d69f..3f64181 100644
--- a/src/algorithms.jl
+++ b/src/algorithms.jl
@@ -1,6 +1,6 @@
 # ODEInterface.jl Algorithms
 
-@compat abstract type ODEInterfaceAlgorithm <: DiffEqBase.AbstractODEAlgorithm end
+abstract type ODEInterfaceAlgorithm <: DiffEqBase.AbstractODEAlgorithm end
 struct dopri5 <: ODEInterfaceAlgorithm end
 struct dop853 <: ODEInterfaceAlgorithm end
 struct odex <: ODEInterfaceAlgorithm end
diff --git a/src/solve.jl b/src/solve.jl
index f3cafb2..1b0a464 100644
--- a/src/solve.jl
+++ b/src/solve.jl
@@ -79,7 +79,7 @@ function DiffEqBase.__solve(
     o[:OUTPUTFCN] = outputfcn
     if !(typeof(callbacks_internal.continuous_callbacks)<:Tuple{}) || !isempty(saveat)
         if typeof(alg) <: Union{ddeabm,ddebdf}
-            warn("saveat and continuous callbacks ignored for ddeabm and ddebdf")
+            @warn("saveat and continuous callbacks ignored for ddeabm and ddebdf")
             o[:OUTPUTMODE] = ODEInterface.OUTPUTFCN_WODENSE
         else
             o[:OUTPUTMODE] = ODEInterface.OUTPUTFCN_DENSE
@@ -145,16 +145,16 @@ function DiffEqBase.__solve(
 
     if retcode < 0
         if retcode == -1
-            verbose && warn("Input is not consistent.")
+            verbose && @warn("Input is not consistent.")
             return_retcode = :Failure
         elseif retcode == -2
-            verbose && warn("Interrupted. Larger maxiters is needed.")
+            verbose && @warn("Interrupted. Larger maxiters is needed.")
             return_retcode = :MaxIters
         elseif retcode == -3
-            verbose && warn("Step size went too small.")
+            verbose && @warn("Step size went too small.")
             return_retcode = :DtLessThanMin
         elseif retcode == -4
-            verbose && warn("Interrupted. Problem is probably stiff.")
+            verbose && @warn("Interrupted. Problem is probably stiff.")
             return_retcode = :Unstable
         end
     else