diff --git a/CHANGELOG.md b/CHANGELOG.md
index 659ec4cdf1..77848fde9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,55 @@
 BioJava Changelog
 -----------------
 
+BioJava 7.3.0
+==============================
+### Added
+* Fetching, caching and display of electron density and cryo-EM maps #1134
+* Checksum verification (MD5, SHA-1, SHA-256) in `FileDownloadUtils`, replacing the previous
+  stub. Downloads from `files.wwpdb.org` and `files.rcsb.org` are checksummed from their `ETag`
+  without a second request #1133
+* `HttpStatusException`, so callers can tell "not there" from a transport failure #1133
+* `FileDownloadUtils.downloadFileWithValidation()`, which downloads and validates over a single
+  connection #1133
+* `LocalPDBDirectory.getMiddleHash(String)`, computing the two-character directory from the
+  right so that it is correct for both short and extended PDB IDs #1133
+* Support for the ECOD distribution format introduced at v294.1 #1141 #1139
+
+### Performance
+* Contact calculation is about 1.5x faster: squared distances compared against a squared cutoff,
+  primitive arrays in `GridCell` instead of boxed lists, and a pre-sized `AtomContactSet` #1147
+* ASA calculation is about 1.2-1.3x faster, by the same replacement of objects with flat
+  primitive arrays in the hot loops #1148
+* `EcodInstallation.getVersion()` reads the file header instead of parsing every domain. The
+  current release is 653 MB and holds nearly three million records #1141
+
+### Fixed
+* CATH downloads use https and check the response before caching it. The previous http URL began
+  redirecting, and the redirect body was cached as classification data #1133 #1138
+* CATH parsing no longer throws `ArrayIndexOutOfBoundsException` on blank or truncated lines, and
+  cached files are validated before being used #1145
+* Chemical component downloads reject redirects and error responses rather than caching them #1133
+* Redirects that `HttpURLConnection` does not follow by itself - 307, 308, and any that change
+  http to https - are now followed #1151 #1149
+* `FileDownloadUtils`: the `hash` argument was ignored by one overload; downloads could be
+  silently truncated; temporary files leaked on failure; `validateFile` threw on a file with no
+  parent directory and on an empty `.size` sidecar #1133
+* mmCIF writer emits the entry identifier as a data item, so `getPdbId()` survives a
+  write-then-read round trip #1144 #1143
+* The ECOD read lock is left balanced when a download fails, so the original error is no longer
+  replaced by `IllegalMonitorStateException` #1150
+* Resolution parsing warns only when the values actually differ
+
+### Changed
+* `createValidationFiles()` now defaults to `ETagPolicy.USE_IF_HEX_DIGEST`, so existing callers
+  begin recording checksums where the server offers one #1133
+* Integration tests run nightly rather than on every pull request #1137 #1135
+* Tests migrated to JUnit 5 #1125 #1126 #1038
+* Library upgrades #1130 #1132
+
+### Removed
+* The `junit-addons` test dependency, no longer needed after the JUnit 5 migration #1126
+
 BioJava 7.2.6
 ==============================
 ### Fixed
diff --git a/biojava-aa-prop/pom.xml b/biojava-aa-prop/pom.xml
index 22bc632906..04db67d2ac 100644
--- a/biojava-aa-prop/pom.xml
+++ b/biojava-aa-prop/pom.xml
@@ -2,7 +2,7 @@
 	<parent>
 		<artifactId>biojava</artifactId>
 		<groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>biojava-aa-prop</artifactId>
@@ -70,12 +70,12 @@
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-core</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-structure</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 		</dependency>
 
 		<!-- logging dependencies (managed by parent pom, don't set versions or scopes here) -->
diff --git a/biojava-alignment/pom.xml b/biojava-alignment/pom.xml
index 7ff8f29cf4..7f0594181f 100644
--- a/biojava-alignment/pom.xml
+++ b/biojava-alignment/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<artifactId>biojava</artifactId>
 		<groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>biojava-alignment</artifactId>
 	<name>biojava-alignment</name>
@@ -47,7 +47,7 @@
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-core</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
diff --git a/biojava-core/pom.xml b/biojava-core/pom.xml
index 4826cf9d17..2085e47b5b 100644
--- a/biojava-core/pom.xml
+++ b/biojava-core/pom.xml
@@ -3,7 +3,7 @@
 	<parent>
 		<artifactId>biojava</artifactId>
 		<groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>biojava-core</artifactId>
diff --git a/biojava-genome/pom.xml b/biojava-genome/pom.xml
index e469de412c..956cfaa2dd 100644
--- a/biojava-genome/pom.xml
+++ b/biojava-genome/pom.xml
@@ -3,7 +3,7 @@
 	<parent>
 		<artifactId>biojava</artifactId>
 		<groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>biojava-genome</artifactId>
@@ -73,13 +73,13 @@
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-core</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-alignment</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<!-- logging dependencies (managed by parent pom, don't set versions or scopes here) -->
diff --git a/biojava-integrationtest/pom.xml b/biojava-integrationtest/pom.xml
index 870612fc63..81ec390cc7 100644
--- a/biojava-integrationtest/pom.xml
+++ b/biojava-integrationtest/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <artifactId>biojava</artifactId>
     <groupId>org.biojava</groupId>
-    <version>7.2.7-SNAPSHOT</version>
+    <version>7.3.0-SNAPSHOT</version>
   </parent>
   <artifactId>biojava-integrationtest</artifactId>
   <packaging>jar</packaging>
@@ -40,7 +40,7 @@
     <dependency>
     	<groupId>org.biojava</groupId>
     	<artifactId>biojava-structure</artifactId>
-    	<version>7.2.7-SNAPSHOT</version>
+    	<version>7.3.0-SNAPSHOT</version>
     </dependency>
 		<!-- logging dependencies (managed by parent pom, don't set versions or scopes here) -->
 		<dependency>
diff --git a/biojava-modfinder/pom.xml b/biojava-modfinder/pom.xml
index e0db50f1db..343aa74f6c 100644
--- a/biojava-modfinder/pom.xml
+++ b/biojava-modfinder/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<artifactId>biojava</artifactId>
 		<groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>biojava-modfinder</artifactId>
 	<name>biojava-modfinder</name>
@@ -31,7 +31,7 @@
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-structure</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/biojava-ontology/pom.xml b/biojava-ontology/pom.xml
index eb9e3564c1..efc24f1290 100644
--- a/biojava-ontology/pom.xml
+++ b/biojava-ontology/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.biojava</groupId>
     <artifactId>biojava</artifactId>
-    <version>7.2.7-SNAPSHOT</version>
+    <version>7.3.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>biojava-ontology</artifactId>
diff --git a/biojava-protein-comparison-tool/pom.xml b/biojava-protein-comparison-tool/pom.xml
index 1527d691f4..8f6fb7f420 100644
--- a/biojava-protein-comparison-tool/pom.xml
+++ b/biojava-protein-comparison-tool/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<artifactId>biojava</artifactId>
 		<groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>biojava-protein-comparison-tool</artifactId>
@@ -36,23 +36,23 @@
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-alignment</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 
 		</dependency>
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-core</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-structure</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-structure-gui</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>net.sourceforge.jmol</groupId>
diff --git a/biojava-protein-disorder/pom.xml b/biojava-protein-disorder/pom.xml
index 827c708a2b..434f6d3f18 100644
--- a/biojava-protein-disorder/pom.xml
+++ b/biojava-protein-disorder/pom.xml
@@ -3,7 +3,7 @@
 	<parent>
 		<artifactId>biojava</artifactId>
 		<groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>biojava-protein-disorder</artifactId>
 	<packaging>jar</packaging>
@@ -63,7 +63,7 @@
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-core</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 		</dependency>
 		<!-- logging dependencies (managed by parent pom, don't set versions or
 			scopes here) -->
diff --git a/biojava-structure-gui/pom.xml b/biojava-structure-gui/pom.xml
index 21e01ce42e..14a38eb37f 100644
--- a/biojava-structure-gui/pom.xml
+++ b/biojava-structure-gui/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>biojava</artifactId>
         <groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>biojava-structure-gui</artifactId>
@@ -27,13 +27,13 @@
         <dependency>
             <groupId>org.biojava</groupId>
             <artifactId>biojava-structure</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>org.biojava</groupId>
             <artifactId>biojava-core</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
 
diff --git a/biojava-structure/pom.xml b/biojava-structure/pom.xml
index 647ab49c72..e3b5163341 100644
--- a/biojava-structure/pom.xml
+++ b/biojava-structure/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<artifactId>biojava</artifactId>
 		<groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>biojava-structure</artifactId>
 	<name>biojava-structure</name>
@@ -51,13 +51,13 @@
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-alignment</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-core</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 
diff --git a/biojava-survival/pom.xml b/biojava-survival/pom.xml
index 570a2dd99b..8115693dfc 100644
--- a/biojava-survival/pom.xml
+++ b/biojava-survival/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.biojava</groupId>
         <artifactId>biojava</artifactId>
-        <version>7.2.7-SNAPSHOT</version>
+        <version>7.3.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>biojava-survival</artifactId>
diff --git a/biojava-ws/pom.xml b/biojava-ws/pom.xml
index c3fe2a9513..ebc18949ed 100644
--- a/biojava-ws/pom.xml
+++ b/biojava-ws/pom.xml
@@ -3,7 +3,7 @@
 	<parent>
 		<artifactId>biojava</artifactId>
 		<groupId>org.biojava</groupId>
-		<version>7.2.7-SNAPSHOT</version>
+		<version>7.3.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>biojava-ws</artifactId>
 	<name>biojava-ws</name>
@@ -19,7 +19,7 @@
 		<dependency>
 			<groupId>org.biojava</groupId>
 			<artifactId>biojava-core</artifactId>
-			<version>7.2.7-SNAPSHOT</version>
+			<version>7.3.0-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
diff --git a/pom.xml b/pom.xml
index 79db94ee26..dbed771382 100644
--- a/pom.xml
+++ b/pom.xml
@@ -12,7 +12,7 @@
 	<groupId>org.biojava</groupId>
 	<artifactId>biojava</artifactId>
 	<packaging>pom</packaging>
-	<version>7.2.7-SNAPSHOT</version>
+	<version>7.3.0-SNAPSHOT</version>
 	<name>biojava</name>
 	<description>BioJava is an open-source project dedicated to providing a Java framework for processing biological
         data. It provides analytical and statistical routines, parsers for common file formats and allows the