diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 082a9ad3..60a61cce 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -16,7 +16,6 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.0'
           - '1.6'
           - '1'
           - 'nightly'
@@ -25,9 +24,6 @@ jobs:
         os:
           - ubuntu-latest
         include:
-          - version: '1.5'
-            arch: x64
-            os: ubuntu-20.04
           - version: '1.7'
             arch: x64
             os: ubuntu-20.04
diff --git a/Project.toml b/Project.toml
index 4859ba8d..24139691 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,8 +1,9 @@
 name = "BenchmarkTools"
 uuid = "6e4b80f9-dd63-53aa-95a3-0cdb28fa8baf"
-version = "1.5.0"
+version = "1.6.0"
 
 [deps]
+Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
 JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 Logging = "56ddb016-857b-54e1-b83d-db4d58db5568"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
@@ -12,6 +13,7 @@ UUIDs = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 
 [compat]
 Aqua = "0.8"
+Compat = ">= 4.11.0"
 JSON = "0.18, 0.19, 0.20, 0.21"
 JuliaFormatter = "1"
 Logging = "<0.0.1, 1"
@@ -20,7 +22,7 @@ Profile = "<0.0.1, 1"
 Statistics = "<0.0.1, 1"
 Test = "<0.0.1, 1"
 UUIDs = "<0.0.1, 1"
-julia = "1"
+julia = "1.6"
 
 [extras]
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
diff --git a/src/BenchmarkTools.jl b/src/BenchmarkTools.jl
index 12354f47..37102cbe 100644
--- a/src/BenchmarkTools.jl
+++ b/src/BenchmarkTools.jl
@@ -8,12 +8,7 @@ using Statistics
 using UUIDs: uuid4
 using Printf
 using Profile
-
-const BENCHMARKTOOLS_VERSION = if VERSION >= v"1.9"
-    pkgversion(BenchmarkTools)
-else
-    v"1.4.0"
-end
+using Compat
 
 ##############
 # Parameters #
diff --git a/src/serialization.jl b/src/serialization.jl
index 23f7aabe..7bec2c8d 100644
--- a/src/serialization.jl
+++ b/src/serialization.jl
@@ -1,5 +1,5 @@
 const VERSIONS = Dict(
-    "Julia" => string(VERSION), "BenchmarkTools" => string(BENCHMARKTOOLS_VERSION)
+    "Julia" => string(VERSION), "BenchmarkTools" => pkgversion(BenchmarkTools)
 )
 
 # TODO: Add any new types as they're added