diff --git a/packages/commands/install/install.cr b/packages/commands/install/install.cr
index ce5a8cc..f03f76c 100644
--- a/packages/commands/install/install.cr
+++ b/packages/commands/install/install.cr
@@ -26,7 +26,7 @@ module Commands::Install
     *,
     reporter : Reporter? = nil,
     store : ::Store? = nil,
-    raise_on_failure : Bool = false
+    raise_on_failure : Bool = false,
   )
     state = uninitialized State
     reporter ||= config.silent ? Reporter::Null.new : Reporter::Interactive.new
@@ -164,7 +164,7 @@ module Commands::Install
     inferred_context : Core::Config::InferredContext,
     install_config : Install::Config,
     lockfile : Data::Lockfile,
-    workspaces : Workspaces?
+    workspaces : Workspaces?,
   )
     unless config.silent
       workers_info = begin
@@ -206,7 +206,7 @@ module Commands::Install
     install_config : Install::Config,
     lockfile : Data::Lockfile,
     context : Core::Config::InferredContext,
-    reporter : Reporter
+    reporter : Reporter,
   ) : Core::Config
     if !config.global && lockfile.strategy && lockfile.strategy != install_config.strategy
       Log.debug { "Install strategy changed from #{lockfile.strategy} to #{install_config.strategy}" if lockfile.strategy }
@@ -290,6 +290,7 @@ module Commands::Install
   end
 
   private def self.resolve_dependencies(state : State)
+    state.pipeline.set_concurrency(state.config.network_concurrency * 3)
     state.reporter.report_resolver_updates do
       # Resolve overrides
       Log.debug { "• Resolving overrides" }
diff --git a/packages/commands/install/protocol/registry/resolver.cr b/packages/commands/install/protocol/registry/resolver.cr
index 1100353..e52adfb 100644
--- a/packages/commands/install/protocol/registry/resolver.cr
+++ b/packages/commands/install/protocol/registry/resolver.cr
@@ -23,7 +23,7 @@ struct Commands::Install::Protocol::Registry::Resolver < Commands::Install::Prot
     specifier = "latest",
     parent = nil,
     dependency_type = nil,
-    skip_cache = false
+    skip_cache = false,
   )
     super
 
@@ -73,7 +73,7 @@ struct Commands::Install::Protocol::Registry::Resolver < Commands::Install::Prot
       shasum = dist.shasum
       version = metadata.version
       unsupported_algorithm = false
-      algorithm, hash, algorithm_instance = nil, nil, nil
+      algorithm, hash = nil, nil
 
       if integrity
         algorithm, hash = integrity.split("-")
@@ -81,17 +81,18 @@ struct Commands::Install::Protocol::Registry::Resolver < Commands::Install::Prot
         unsupported_algorithm = true
       end
 
-      algorithm_instance = case algorithm
-                           when "sha1"
-                             Digest::SHA1.new
-                           when "sha256"
-                             Digest::SHA256.new
-                           when "sha512"
-                             Digest::SHA512.new
-                           else
-                             unsupported_algorithm = true
-                             Digest::SHA1.new
-                           end
+      algorithm_instance =
+        case algorithm
+        when "sha1"
+          -> { Digest::SHA1.new }
+        when "sha256"
+          -> { Digest::SHA256.new }
+        when "sha512"
+          -> { Digest::SHA512.new }
+        else
+          unsupported_algorithm = true
+          -> { Digest::SHA1.new }
+        end
 
       # the tarball_url is absolute and can point to an entirely different domain
       # so we need to find the right client pool for it
@@ -103,7 +104,7 @@ struct Commands::Install::Protocol::Registry::Resolver < Commands::Install::Prot
         client.get("/" + relative_url) do |response|
           raise "Invalid status code from #{tarball_url} (#{response.status_code})" unless response.status_code == 200
 
-          IO::Digest.new(response.body_io, algorithm_instance).tap do |io|
+          IO::Digest.new(response.body_io, algorithm_instance.call).tap do |io|
             state.store.unpack_and_store_tarball(metadata, io)
 
             io.skip_to_end
diff --git a/packages/core/config.cr b/packages/core/config.cr
index 194f566..18dae76 100644
--- a/packages/core/config.cr
+++ b/packages/core/config.cr
@@ -56,7 +56,7 @@ struct Core::Config
     {% end %}
   )
   @[Env]
-  getter network_concurrency : Int32 = 50
+  getter network_concurrency : Int32 = 15
   @[Env]
   getter lockfile_format : Data::Lockfile::Format? = nil
 
diff --git a/packages/workspaces/workspaces.cr b/packages/workspaces/workspaces.cr
index 13657a2..09473e6 100644
--- a/packages/workspaces/workspaces.cr
+++ b/packages/workspaces/workspaces.cr
@@ -46,7 +46,7 @@ class Workspaces
       workspaces_field = workspaces_field["packages"]
     end
 
-    return if workspaces_field.nil?
+    return if workspaces_field.nil? || workspaces_field.empty?
 
     #################
     # Gitignore rules from: https://git-scm.com/docs/gitignore