diff --git a/.travis.yml b/.travis.yml
index 17700ba..90b1e69 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,9 +5,8 @@ os:
   - osx
 julia:
   - 1.0
-  - 1.1
-  - 1.2
   - 1.3
+  - 1.6
   - nightly
 notifications:
   email: false
diff --git a/Project.toml b/Project.toml
index 1fe2319..644a77d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -2,7 +2,7 @@ name = "MemPool"
 uuid = "f9f48841-c794-520a-933b-121f7ba6ed94"
 license = "MIT"
 desc = "a simple distributed data store"
-version = "0.3.4"
+version = "0.3.5"
 
 [deps]
 DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
diff --git a/appveyor.yml b/appveyor.yml
index 4331147..cfaf75f 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,10 +1,9 @@
 environment:
   matrix:
   - julia_version: 1.0
-  - julia_version: 1.1
-  - julia_version: 1.2
   - julia_version: 1.3
-  - julia_version: latest
+  - julia_version: 1.6
+  - julia_version: nightly
 
 platform:
   - x86 # 32-bit
diff --git a/src/lock.jl b/src/lock.jl
index ec84655..665a865 100644
--- a/src/lock.jl
+++ b/src/lock.jl
@@ -22,11 +22,17 @@ end
 
 Base.unlock(nrl::NonReentrantLock) = unlock(nrl.rl)
 
+if VERSION >= v"1.7.0-DEV"
+# as of v1.7 locks in Base disable finalizers
+enable_finalizers(on::Bool) = nothing
+else
 # NonReentrantLock may be taken around code that might call the GC, which might
 # reenter through finalizers.  Avoid that by temporarily disabling finalizers
 # running concurrently on this thread.
 enable_finalizers(on::Bool) = ccall(:jl_gc_enable_finalizers, Cvoid,
                                     (Ptr{Cvoid}, Int32,), Core.getptls(), on)
+end
+
 macro safe_lock(l, ex)
     quote
         temp = $(esc(l))