diff --git a/Project.toml b/Project.toml
index b817c517a..6aa67c34c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -23,6 +23,7 @@ LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
 Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
 NaNMath = "77ba4419-2d1f-58cd-9bb1-8ffee604a2e3"
+PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
 RecipesBase = "3cdcf5f2-1ef4-517c-9805-6587b60abb01"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 Requires = "ae029012-a4dd-5104-9daa-d747884805df"
@@ -54,6 +55,7 @@ DynamicPolynomials = "0.5"
 Groebner = "0.3, 0.4"
 IfElse = "0.1"
 LaTeXStrings = "1.3"
+LambertW = "0.4.5"
 Latexify = "0.11, 0.12, 0.13, 0.14, 0.15, 0.16"
 MacroTools = "0.5"
 NaNMath = "0.3, 1"
@@ -68,7 +70,6 @@ SpecialFunctions = "0.7, 0.8, 0.9, 0.10, 1.0, 2"
 StaticArrays = "1.1"
 SymbolicUtils = "1.0.1"
 TreeViews = "0.3"
-LambertW = "0.4.5"
 julia = "1.6"
 
 [extras]
diff --git a/src/Symbolics.jl b/src/Symbolics.jl
index 1b7e0c066..47066f31e 100644
--- a/src/Symbolics.jl
+++ b/src/Symbolics.jl
@@ -3,43 +3,47 @@ $(DocStringExtensions.README)
 """
 module Symbolics
 
-using DocStringExtensions, Markdown
-
-using LinearAlgebra
-
-using Reexport
-
-using DomainSets
-
-using Setfield
-
-import DomainSets: Domain
+using PrecompileTools
+
+@recompile_invalidations begin
+
+    using DocStringExtensions, Markdown
+
+    using LinearAlgebra
+
+    using Reexport
+
+    using DomainSets
+
+    using Setfield
+
+    import DomainSets: Domain
+    
+    import SymbolicUtils: similarterm, istree, operation, arguments, symtype, metadata
+    
+    import SymbolicUtils: Term, Add, Mul, Pow, Sym, Div, BasicSymbolic,
+    FnType, @rule, Rewriters, substitute,
+    promote_symtype, isadd, ismul, ispow, isterm, issym, isdiv
+    
+    using SymbolicUtils.Code
+    
+    import SymbolicUtils.Rewriters: Chain, Prewalk, Postwalk, Fixpoint
+    
+    import SymbolicUtils.Code: toexpr
+    
+    import ArrayInterface
+    using RuntimeGeneratedFunctions
+    using SciMLBase, IfElse
+    using MacroTools
+end
 @reexport using SymbolicUtils
-
-import SymbolicUtils: similarterm, istree, operation, arguments, symtype, metadata
-
-import SymbolicUtils: Term, Add, Mul, Pow, Sym, Div, BasicSymbolic,
-                      FnType, @rule, Rewriters, substitute,
-                      promote_symtype, isadd, ismul, ispow, isterm, issym, isdiv
-
-using SymbolicUtils.Code
-
-import SymbolicUtils.Rewriters: Chain, Prewalk, Postwalk, Fixpoint
-
-import SymbolicUtils.Code: toexpr
-
-import ArrayInterface
-
-using RuntimeGeneratedFunctions
 RuntimeGeneratedFunctions.init(@__MODULE__)
 
 # re-export
 
 export simplify, substitute
 
-using SciMLBase, IfElse
 export Num
-using MacroTools
 import MacroTools: splitdef, combinedef, postwalk, striplines
 include("wrapper-types.jl")