diff --git a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrConversionUtils.java b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrConversionUtils.java
index 0099bc44e..7d128644c 100644
--- a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrConversionUtils.java
+++ b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrConversionUtils.java
@@ -51,7 +51,6 @@ public class SolrConversionUtils {
 			SearchInputDocument doc) {
 		SolrInputDocument solrDoc = new SolrInputDocument(
 				convertToSolrInputFieldMap(doc.getFieldMap()));
-		solrDoc.setDocumentBoost(doc.getDocumentBoost());
 		return solrDoc;
 	}
 
@@ -81,11 +80,10 @@ public class SolrConversionUtils {
 			// No values, nothing to do.
 		} else if (values.size() == 1) {
 			// One value? Insure that it is accepted as such.
-			solrField.addValue(values.iterator().next(),
-					searchInputField.getBoost());
+			solrField.addValue(values.iterator().next());
 		} else {
 			// A collection of values? Add them.
-			solrField.addValue(values, searchInputField.getBoost());
+			solrField.addValue(values);
 		}
 
 		return solrField;
@@ -125,7 +123,6 @@ public class SolrConversionUtils {
 	 * Convert from a SearchQuery to a SolrQuery, so the Solr server may execute
 	 * it.
 	 */
-	@SuppressWarnings("deprecation")
 	static SolrQuery convertToSolrQuery(SearchQuery query) {
 		SolrQuery solrQuery = new SolrQuery(query.getQuery());
 		solrQuery.setStart(query.getStart());
@@ -141,7 +138,7 @@ public class SolrConversionUtils {
 
 		Map<String, Order> sortFields = query.getSortFields();
 		for (String sortField : sortFields.keySet()) {
-			solrQuery.addSortField(sortField,
+			solrQuery.addOrUpdateSort(sortField,
 					convertToSolrOrder(sortFields.get(sortField)));
 		}
 
diff --git a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrSearchEngine.java b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrSearchEngine.java
index be3738ea4..fbea3bb95 100644
--- a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrSearchEngine.java
+++ b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrSearchEngine.java
@@ -10,10 +10,13 @@ import java.util.Collection;
 
 import javax.servlet.ServletContext;
 
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.impl.client.StandardHttpRequestRetryHandler;
+import org.apache.solr.client.solrj.SolrClient;
 import org.apache.solr.client.solrj.SolrQuery;
 import org.apache.solr.client.solrj.SolrServerException;
-import org.apache.solr.client.solrj.impl.ConcurrentUpdateSolrServer;
-import org.apache.solr.client.solrj.impl.HttpSolrServer;
+import org.apache.solr.client.solrj.impl.ConcurrentUpdateSolrClient;
+import org.apache.solr.client.solrj.impl.HttpSolrClient;
 import org.apache.solr.client.solrj.response.QueryResponse;
 
 import edu.cornell.mannlib.vitro.webapp.config.ConfigurationProperties;
@@ -32,8 +35,8 @@ import edu.cornell.mannlib.vitro.webapp.searchengine.base.BaseSearchQuery;
  * The Solr-based implementation of SearchEngine.
  */
 public class SolrSearchEngine implements SearchEngine {
-	private HttpSolrServer queryEngine;
-	private ConcurrentUpdateSolrServer updateEngine;
+	private SolrClient queryEngine;
+	private ConcurrentUpdateSolrClient updateEngine;
 
 	/**
 	 * Set up the http connection with the solr server
@@ -53,16 +56,26 @@ public class SolrSearchEngine implements SearchEngine {
 		}
 
 		try {
-			queryEngine = new HttpSolrServer(solrServerUrlString);
-			queryEngine.setSoTimeout(10000); // socket read timeout
-			queryEngine.setConnectionTimeout(10000);
-			queryEngine.setDefaultMaxConnectionsPerHost(100);
-			queryEngine.setMaxTotalConnections(100);
-			queryEngine.setMaxRetries(1);
+			HttpSolrClient.Builder builder = new HttpSolrClient.Builder(solrServerUrlString);
 
-			updateEngine = new ConcurrentUpdateSolrServer(solrServerUrlString, 100, 1);
-			updateEngine.setConnectionTimeout(10000);
-			updateEngine.setPollQueueTime(25);
+			builder.withSocketTimeout(10000); // socket read timeout
+			builder.withConnectionTimeout(10000);
+
+			HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
+			httpClientBuilder.setMaxConnPerRoute(100);
+			httpClientBuilder.setMaxConnTotal(100);
+			httpClientBuilder.setRetryHandler(new StandardHttpRequestRetryHandler(1, false));
+
+			builder.withHttpClient(httpClientBuilder.build());
+
+			queryEngine = builder.build();
+
+			ConcurrentUpdateSolrClient.Builder updateBuilder =
+					new ConcurrentUpdateSolrClient.Builder(solrServerUrlString);
+			updateBuilder.withConnectionTimeout(10000);
+			// no apparent 7.4.0 analogy to `setPollQueueTime(25)`
+
+			updateEngine = updateBuilder.build();
 
 			css.info("Set up the Solr search engine; URL = '" + solrServerUrlString + "'.");
 		} catch (Exception e) {
@@ -72,8 +85,12 @@ public class SolrSearchEngine implements SearchEngine {
 
 	@Override
 	public void shutdown(Application application) {
-		queryEngine.shutdown();
-		updateEngine.shutdown();
+		try {
+			queryEngine.close();
+		} catch (IOException e) {
+			throw new RuntimeException("Error shutting down 'queryEngine'", e);
+		}
+		updateEngine.shutdownNow();
 	}
 
 	@Override
@@ -170,7 +187,7 @@ public class SolrSearchEngine implements SearchEngine {
 			SolrQuery solrQuery = SolrConversionUtils.convertToSolrQuery(query);
 			QueryResponse response = queryEngine.query(solrQuery);
 			return SolrConversionUtils.convertToSearchResponse(response);
-		} catch (SolrServerException e) {
+		} catch (SolrServerException | IOException e) {
 			throw appropriateException(
 					"Solr server failed to execute the query" + query, e);
 		}
diff --git a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/servlet/setup/SolrSmokeTest.java b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/servlet/setup/SolrSmokeTest.java
index 131a79821..dad23248d 100644
--- a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/servlet/setup/SolrSmokeTest.java
+++ b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/servlet/setup/SolrSmokeTest.java
@@ -235,7 +235,7 @@ public class SolrSmokeTest implements ServletContextListener {
 
 		private void tryToConnect() throws SolrProblemException {
 			try {
-				HttpGet method = new HttpGet(solrUrl.toExternalForm());
+				HttpGet method = new HttpGet(solrUrl.toExternalForm() + "/select");
 				SolrSmokeTest.log.debug("Trying to connect to Solr");
 				HttpResponse response = httpClient.execute(method);
 				try {
diff --git a/dependencies/pom.xml b/dependencies/pom.xml
index e6d8219c6..5ddb541af 100644
--- a/dependencies/pom.xml
+++ b/dependencies/pom.xml
@@ -207,7 +207,7 @@
         <dependency>
             <groupId>org.apache.solr</groupId>
             <artifactId>solr-solrj</artifactId>
-            <version>4.10.4</version>
+            <version>7.4.0</version>
         </dependency>
         <dependency>
             <groupId>org.directwebremoting</groupId>
diff --git a/installer/pom.xml b/installer/pom.xml
index 39671fd6d..f6e443309 100644
--- a/installer/pom.xml
+++ b/installer/pom.xml
@@ -105,7 +105,7 @@
 
     <modules>
         <module>home</module>
-        <module>solr</module>
+        <!--<module>solr</module>-->
         <module>webapp</module>
     </modules>
 
diff --git a/pom.xml b/pom.xml
index fe71d8acb..84267b2fc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -67,7 +67,7 @@
         <module>api</module>
         <module>dependencies</module>
         <module>webapp</module>
-        <module>solr</module>
+        <!--<module>solr</module>-->
         <module>home</module>
     </modules>