diff --git a/ext/IntegralsFastGaussQuadratureExt.jl b/ext/IntegralsFastGaussQuadratureExt.jl
index 54058525..bb08952c 100644
--- a/ext/IntegralsFastGaussQuadratureExt.jl
+++ b/ext/IntegralsFastGaussQuadratureExt.jl
@@ -1,13 +1,8 @@
 module IntegralsFastGaussQuadratureExt
 using Integrals
-if isdefined(Base, :get_extension)
-    import FastGaussQuadrature
-    import FastGaussQuadrature: gausslegendre
-    # and eventually gausschebyshev, etc.
-else
-    import ..FastGaussQuadrature
-    import ..FastGaussQuadrature: gausslegendre
-end
+import FastGaussQuadrature
+import FastGaussQuadrature: gausslegendre
+
 using LinearAlgebra
 
 Integrals.gausslegendre(n) = FastGaussQuadrature.gausslegendre(n)
diff --git a/ext/IntegralsForwardDiffExt.jl b/ext/IntegralsForwardDiffExt.jl
index f09309cf..1775048e 100644
--- a/ext/IntegralsForwardDiffExt.jl
+++ b/ext/IntegralsForwardDiffExt.jl
@@ -1,6 +1,6 @@
 module IntegralsForwardDiffExt
 using Integrals
-isdefined(Base, :get_extension) ? (using ForwardDiff) : (using ..ForwardDiff)
+using ForwardDiff
 ### Forward-Mode AD Intercepts
 
 function Integrals._evaluate!(f, y, u,
diff --git a/ext/IntegralsZygoteExt.jl b/ext/IntegralsZygoteExt.jl
index ea4c55b9..a6b270ef 100644
--- a/ext/IntegralsZygoteExt.jl
+++ b/ext/IntegralsZygoteExt.jl
@@ -1,15 +1,10 @@
 module IntegralsZygoteExt
 using LinearAlgebra: dot
 using Integrals
-if isdefined(Base, :get_extension)
-    using Zygote
-    import ChainRulesCore
-    import ChainRulesCore: Tangent, NoTangent, ProjectTo
-else
-    using ..Zygote
-    import ..Zygote.ChainRulesCore
-    import ..Zygote.ChainRulesCore: Tangent, NoTangent, ProjectTo
-end
+using Zygote
+import ChainRulesCore
+import ChainRulesCore: Tangent, NoTangent, ProjectTo
+
 ChainRulesCore.@non_differentiable Integrals.checkkwargs(kwargs...)
 ChainRulesCore.@non_differentiable Integrals.isinplace(f, args...)    # fixes #99
 ChainRulesCore.@non_differentiable Integrals.init_cacheval(alg, prob)
diff --git a/src/Integrals.jl b/src/Integrals.jl
index 4ea9e5c5..d49e065a 100644
--- a/src/Integrals.jl
+++ b/src/Integrals.jl
@@ -1,9 +1,5 @@
 module Integrals
 
-if !isdefined(Base, :get_extension)
-    using Requires
-end
-
 using Reexport, MonteCarloIntegration, QuadGK, HCubature
 @reexport using SciMLBase
 using LinearAlgebra