diff --git a/gemstash.gemspec b/gemstash.gemspec
index 5522f6ea..ce232a01 100644
--- a/gemstash.gemspec
+++ b/gemstash.gemspec
@@ -39,7 +39,7 @@ you push your own private gems as well."
   spec.add_runtime_dependency "lru_redux", "~> 1.1"
   spec.add_runtime_dependency "psych", ">= 3.2.1"
   spec.add_runtime_dependency "puma", "~> 6.1"
-  spec.add_runtime_dependency "sequel", "~> 5.0"
+  spec.add_runtime_dependency "sequel", "~> 5.85"
   spec.add_runtime_dependency "server_health_check-rack", "~> 0.1"
   spec.add_runtime_dependency "sinatra", ">= 1.4", "< 5.0"
   spec.add_runtime_dependency "terminal-table", "~> 3.0"
@@ -53,7 +53,7 @@ you push your own private gems as well."
   # spec.add_runtime_dependency "mysql2", "~> 0.4"
 
   if RUBY_PLATFORM == "java"
-    spec.add_runtime_dependency "jdbc-sqlite3", "~> 3.8"
+    spec.add_runtime_dependency "jdbc-sqlite3", "~> 3.46"
   else
     # SQLite 3.44+ is required for string_agg support
     spec.add_runtime_dependency "sqlite3", ">= 1.68", "< 3.0"
diff --git a/lib/gemstash/compact_index_builder.rb b/lib/gemstash/compact_index_builder.rb
index bec54407..a0b31b55 100644
--- a/lib/gemstash/compact_index_builder.rb
+++ b/lib/gemstash/compact_index_builder.rb
@@ -87,7 +87,7 @@ def build_result(force_rebuild: false)
           else
             ts = Time.now.iso8601
             versions_file.create(
-              compact_index_public_versions(ts), ts
+              compact_index_public_versions(ts), ts.to_s.sub(/\+00:00\z/, "Z")
             )
             @result = file.read
             resource.save("versions.list" => @result)
@@ -176,14 +176,11 @@ def fetch_resource
 
       def build_result
         @result = CompactIndex.info(requirements_and_dependencies)
-      rescue Sequel::DatabaseError => e
-        raise "Error building info for #{@name}\n\n```sql\n#{e.sql}\n```\n"
       end
 
     private
 
       def requirements_and_dependencies
-        db_type = DB::Rubygem.db.database_type
         DB::Rubygem.association_left_join(versions: :dependencies).
           where(name: @name).
           where { versions[:indexed] }.
@@ -192,24 +189,17 @@ def requirements_and_dependencies
             [versions[:number], versions[:platform], versions[:sha256], versions[:info_checksum], versions[:required_ruby_version], versions[:required_rubygems_version], versions[:created_at]]
           end. # rubocop:disable Style/MultilineBlockChain
           select_more do
-            sa = case db_type
-                 when :sqlite then ->(a, b) { string_agg(a, b) }
-                 else ->(a, b) { Sequel.string_agg(a, b) }
-            end
-            [sa.call(dependencies[:requirements], "@").order(dependencies[:rubygem_name], dependencies[:id]).as(:dep_req_agg),
-             sa.call(dependencies[:rubygem_name], ",").order(dependencies[:rubygem_name]).as(:dep_name_agg)]
+            [coalesce(Sequel.string_agg(dependencies[:requirements], "@").order(dependencies[:rubygem_name], dependencies[:id]), "").as(:dep_req_agg),
+             coalesce(Sequel.string_agg(dependencies[:rubygem_name], ",").order(dependencies[:rubygem_name]), "").as(:dep_name_agg)]
           end. # rubocop:disable Style/MultilineBlockChain
           map do |row|
-          reqs = row[:dep_req_agg]&.split("@")
-          dep_names = row[:dep_name_agg]&.split(",")
+          reqs = row[:dep_req_agg].split("@")
+          dep_names = row[:dep_name_agg].split(",")
 
-          raise "Dependencies and requirements are not the same size:\n  reqs: #{reqs.inspect}\n  dep_names: #{dep_names.inspect}\n  row: #{row.inspect}" if dep_names&.size != reqs&.size
+          raise "Dependencies and requirements are not the same size:\n  reqs: #{reqs.inspect}\n  dep_names: #{dep_names.inspect}\n  row: #{row.inspect}" if dep_names.size != reqs.size
 
-          deps = []
-          if reqs
-            dep_names.zip(reqs).each do |name, req|
-              deps << CompactIndex::Dependency.new(name, req)
-            end
+          deps = dep_names.zip(reqs).map! do |name, req|
+            CompactIndex::Dependency.new(name, req)
           end
 
           CompactIndex::GemVersion.new(
diff --git a/lib/gemstash/env.rb b/lib/gemstash/env.rb
index ff2dc2fc..ef12f5b0 100644
--- a/lib/gemstash/env.rb
+++ b/lib/gemstash/env.rb
@@ -130,7 +130,8 @@ def db
             Sequel.connect("jdbc:sqlite:#{db_path}", config.database_connection_config)
           else
             Sequel.connect("sqlite://#{CGI.escape(db_path)}", config.database_connection_config)
-          end.tap {|db| raise "SQLite 3.44+ required, have #{db.sqlite_version}" unless db.sqlite_version >= 34_400 }
+          end
+          raise "SQLite 3.44+ required, have #{db.sqlite_version}" unless db.sqlite_version >= 34_400
         when "postgres", "mysql", "mysql2"
           db_url = config[:db_url]
           raise "Missing DB URL" unless db_url
diff --git a/spec/integration_spec.rb b/spec/integration_spec.rb
index 59875ba5..5cf5ebc0 100644
--- a/spec/integration_spec.rb
+++ b/spec/integration_spec.rb
@@ -127,7 +127,7 @@
     it "is a conformant gem server", db_transaction: false do
       @gemstash.env.cache.flush
       expect(
-        execute("gem_server_conformance", ["--fail-fast", "--format", "progress", "--tag=~content_length_header"],
+        execute("gem_server_conformance", ["--format", "progress", "--tag=~content_length_header"],
                 env: { "UPSTREAM" => host, "GEM_HOST_API_KEY" => auth_key })
       ).
         to exit_success