diff --git a/Project.toml b/Project.toml
index 48bdde8..ce7adac 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Xtals"
 uuid = "ede5f01d-793e-4c47-9885-c447d1f18d6d"
 authors = ["SimonEnsemble <cory.simon@oregonstate.edu>"]
-version = "0.4.9"
+version = "0.4.10"
 
 [deps]
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
@@ -14,6 +14,7 @@ Graphs = "86223c79-3864-5bf0-83f7-82e725a168b6"
 JLD2 = "033835bb-8acc-5ee8-8aae-3f567f8a3819"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 MetaGraphs = "626554b9-1ddb-594c-aa3c-2596fe9399a5"
+PrecompileSignatures = "91cefc8d-f054-46dc-8f8c-26e11d7c5411"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
@@ -28,6 +29,7 @@ FIGlet = "0.2"
 Graphs = "1.4"
 JLD2 = "0.4"
 MetaGraphs = "0.7"
+PrecompileSignatures = "3.0"
 StaticArrays = "1.3"
 Unitful = "1.11"
 julia = "1.6, 1.7, 1.8"
diff --git a/src/Xtals.jl b/src/Xtals.jl
index 3ffbf5c..4ab7a57 100644
--- a/src/Xtals.jl
+++ b/src/Xtals.jl
@@ -1,6 +1,7 @@
 module Xtals
 
 using AtomsBase, Bio3DView, CSV, DataFrames, FIGlet, Graphs, LinearAlgebra, MetaGraphs, Printf, StaticArrays, Unitful
+using PrecompileSignatures: @precompile_signatures
 
 # global variable dictionary
 global rc = Dict{Symbol,Any}()
@@ -60,4 +61,6 @@ export
     write_bonding_rules, add_bonding_rules, drop_cross_pb_bonds!, bondingrules, bond_angle,
     get_bond_vector, calculate_bond_vectors!, clear_vectors!, bond_distance, infer_bonds
 
+@precompile_signatures(Xtals)
+
 end # module Xtals